The latest round of AO3 comment discourse crossing my dash made me suddenly realize that people are just taking it as a given that AO3 is a "fandom community website". AO3 is often directly compared to Livejournal and other older fandom hubs amidst laments about how "no one cares about participating in their community anymore".
But AO3 is not a "community" website. It's not social media. It's a fanfic archive that was designed to center the fics first and foremost. There is no space on the site for general, casual fandom discussion. You can't even DM other users. The site was designed this way on purpose to protect writers, because its creators were familiar with the ways in which writers have been harassed on other sites and wanted to minimize direct access to writers as much as possible, but that decision comes with the tradeoff of limiting the amount of communication and discussion between fans that is possible on the site.
This is, to be clear, not a criticism of AO3. It accomplishes its goal of being an archive very well. I don't particularly want DMs or larger discussion forums on the site, and I enjoy how it centers the writing it hosts. But as it exists now, it is simply not built to be a "community" and does not function as one. Unlike sites like Livejournal where fic posting and general interpersonal fandom interactions all took place in the same space, fics are posted to AO3 while the "community" for any given fandom now largely takes place on Twitter, Tumblr, Discord, or another site, depending on the fandom.
You're free to personally dislike those spaces and voice valid criticisms about how they function as communities, but they are undeniably where the actual "community" parts of most fandoms currently reside. These sites, not AO3, are where most fans talk to one another, form friendships, and express themselves. It's not impossible to do these things on AO3, but it is not the norm because the site simply is not designed that way.
The latest posts I have seen about commenting culture have gotten this dynamic exactly backwards. If readers are discussing a fic amongst themselves on Twitter or Discord, they're characterized as antisocial and accused of "not participating in the fandom community". But Twitter and Discord are the fandom community sites! The "bookclub" servers and Twitter threads are where the community bonds are being forged between fans! These spaces are the modern analogue to the old Livejournal groups and web rings, not the comments section of any one individual fanfic on AO3.
If an author's only interaction with their fandom is to post fics to AO3 and passively wait to be found, and they aren't seeking out their fellow fans in these other spaces and interacting with them... they are the ones who are "not participating" as much as the readers that are so readily being cast in so much of this discussion as "selfish" or deliberately spiteful for not commenting "enough".
I understand why many of my fellow writers feel this way. I too often find socialization on sites like Twitter and Discord draining and difficult. It takes time and effort to build friendships organically, discuss ideas and share snippets to pique people's interest in a fic before it is posted, and provide reciprocal effort when it comes to everyone else's ideas and snippets and stories, and there are many days when I just don't have the energy for it all. At the same time, I'm also very curious about my readers' thoughts on my stories, and if I learned that they were being discussed in a server I couldn't access, I would want to know what was being said. It's a natural impulse to feel curiosity like this when it comes to one's creative work. And of course, I also love getting comments on my own fics and I'm not immune to feeling disappointed when a fic seems to "flop".
However, it's not fair to take out feelings of disappointment and frustration on readers for participating in their fandom in the spaces where their fandom's community actually exists. If you find out that fandom discussions are happening in a place where you are not present, you have a choice in what action you will take. You can either make the effort to join the discussion, or you can knowingly distance yourself from it. Neither of these choices are objectively correct for every single individual's situation, but you, the AO3 denizen, are the one who needs to choose whether or not to engage with your fandom's community, because AO3 is not where the community lives.
If you choose not to join your fellow fans in their actual community hubs because of low social battery, annoying features, or a site culture you dislike, that's perfectly fine and a valid choice... but you shouldn't be surprised when the author who is participating in their fandom outside of AO3 gets more comments on their fics. And you certainly don't have the right to project your own social withdrawal onto your readers and accuse them of maliciously withholding "community" from you.
Comments are wonderful, and positively encouraging people to leave comments on the fics they enjoy is completely fine, but comments are not community. AO3 is not a community website and in fact is designed to put us writers behind a wall for our own protection. We are the ones who need to choose whether or not to venture out from behind the wall and join our communities, instead of getting angry that the community isn't spontaneously appearing in our comments sections.