Personally, I think the increase in muggle-borns will eventually bridge the gap between wizards and muggles. Not so much that the wizarding world comes out of the broom closet but that they advance into the twenty-first century a bit (quills and torches, really? I can totally see modern muggleborns lamenting the lack of wifi until some clever student magically rigs a hotspot or something) and start seeing muggles as people instead of less than.
I'm not entirely sure which meta/post we're referring to here but anyway since this is an interesting question I'm going to take a whack at it.
Well, we don't know for sure that there has been an increase in muggleborns - only that purebloods seem to think so, and tbh, there's probably a lot of political rhetoric involved in that assertion. I personally like this uncertainty, because it makes for more interesting writing - who's right and who's wrong and whose claims are statistically substantiated?
I will qualify this with the assertion that there easily might be an increase in half-bloods, given that over time families have gone extinct and grown smaller. But again, whether or not they grow up with muggle things, I think, intersects with a lot of gender issues here. E.g. kids growing up with muggle (non-magical) fathers being less likely to grow up practicing magic - esp. if they're the only kid - versus kids growing up with wizarding fathers being more immersed in the wizarding world etc. This, I think, automatically reduces the number of kids who would have been exposed to muggle inventions like wifi etc (especially if wifis can't work near magic because of electronic interference).
Uh, also kids at eleven. Like yeah you're attached to the wifi etc (also idk how attached kids would be to it given that MOST websites have a 13 year old age limit for joining, idk like my cousin who's 11 now spends time playing games but not online?). Ok but imagine someone takes you to a world that you've literally read about your whole life and wished you could be part of - it's almost like your Narnia or your Middle Earth - and says that that's your home, this is you, well idk about you nonny, but at eleven I'd have been more than happy to give up my muggle "comforts" for this shiny new world. And well, the way the wizarding world sort of draws muggleborn kids away from their roots, so to speak, by immersing them for 9 months out of 12 in a magical world (and their education system p much ensures you'll only be able to take up a job in the wizarding world unless you study on your own) would probably mean that kids would be less and less attached to their muggle comforts.
(Though I completely sympathize about quills NOW, I'll say if I was eleven I'd have just been extremely excited to get to write with such a funky instrument. And after a while it'd have just become the norm, y'know? Like you get used to it when you're introduced to and immersed in something at that impressionable an age. And tbh, I think it'd extend to a lot of the technology we have with the exception of TVs and maybe gaming equipment.)
So personally, I think the wizarding world has a long way to go before they can even begin to bridge the gap between wizard and the muggle worlds. They could probably even adopt muggle technology (and then argue it was originally a wizard who invented it) without ever changing their opinions on muggles. I mean honestly? The only way they're going to change their opinions is if they're forced to live like muggles without magic, or to assimilate with the muggles.
And that's unlikely to happen as long as the "injuries" caused by the events leading up to the establishment of the Statute of Secrecy are constantly refreshed and rehearsed in public memory and, presumably, taught as a part of history (without critical examination of the alleged facts, and without listening to alternate versions of that history).
If at all technology finds its way into the wizarding world, imo, it'd be the result of Ravenclaws in their muggle studies classes hearing about these things and wanting to know more and more and why can't they have those things?
Also the Department of Mysteries. Bunch of what's effectively wizarding scientists chilling and doing experiments with magic to figure out how it works - I mean imagine them studying muggle things to figure out how they do it and then just borrowing/stealing their stuff.
So yes. That. Those are my thoughts on wizard/muggle mingling and technology etc.