Do you think the internet (or some equivalent) exists in the world of AC6? If so, how chronically online are the characters?
the internet does exist!!!! in a way!!!!
okay, so the solar colonies all have a very sophisticated internet that functions very well between the various planets in that system, because they use Coral to facilitate near instantaneous data-transfer through communication buoys set up between the colonies. So, someone from Ganymede can instant message someone on Earth with only a very minor lag (of about like, a handful of seconds, rather than the hours it'd be otherwise).
Outside of the solar colonies, however, the internet is more like a planetary intranet - and that's supposing it has supporting infrastructure for it. A very well-established production colony would have internet, with very slow connection to Earth (like, days or weeks to send an email level of slow for the lowly peons, whereas the administrators of that colony would have fancy Coral-based connections that allow near real-time communication), whereas a very basic mining colony wouldn't have internet at all.
This is an additional knock on effect that the Coral shortage brought to the UEG, because it meant that they couldn't construct new communication buoys, which means they couldn't expand the internet infrastructure in the solar colonies, or allow new frontier colonies to have their administrators near real-time communication ability with the head honchos on Earth. They're reduced to literal snail mail, and the UEG don't like that bc having weeks between updates on their far flung colonies mean that sedition may be brewing...
Rubicon used to have internet - amazingly fast internet at that - and the RLF have salvaged some of it to allow telecommunication in some way, but it's not very reliable bc of the half-ruined infrastructure.
As for who would be chronically online... Iguazu would be a whale for online gamblings sites of gacha, Rusty would barely be online at all (but he has a furffinity account), Flatwell would be running catfishing scams (O'Keeffe would be one of his willing victims), 621 would be an esports champion in pokemon or smash, Michigan would have a youtube channel of him showing off various guns or whatever, and Walter would claim that he doesn't go on the internet at all but he's actually a hacktivist along with Carla with an unintentional rivalry with Branch.