One of the smartest things reddit ever did was ensure old.reddit.com remains fully functional. I imagine one day they'll EOL it, and when they do I'll no longer be a reddit user (probably not really a bad thing).
they're gonna start making you log in on old to combat scrapers.
Even if Old Reddit still exists, the vast majority of users are on New Reddit or the app on their phones. Those are designed to keep people endlessly scrolling, not sticking around in any one place and building community. Also, the phone as default device has reduced comments to 140-character quips and one looks like a real weirdo now if one writes a solid paragraph or two like in the old days.