What you describe is basically the flipside of what happened to RSS folks, so I know what you mean. It sucks to stop getting updates the way you’re used to, and more hassle making the transitions to whatever the different method is.
It’s basically the reason Twitter/X still has anyone there, except they have higher switching costs compared to an open following format.
Honestly I take the compromise approach where I can, which is social media that still generates RSS, like Bluesky/Mastodon/etc. and use that to avoid making additional accounts.
If I understand ya right yeah, with BSky/Mastodon you pull the individual feeds for each account if you go that route (or maybe someone has an .opml file of several already grouped by topic to import). To me it’s no worse than having to individually follow them on-platform, but I know I’m atypical in that respect
Once ya have’em it’s all in one feed in your reader so not too different than the following feed