You can follow anyone on any other Mastodon server with that one account, so it's basically the same. That's what the federation is for.

I had to stop using Reddit with the recent redesign. There's no way to get at a community you like without being stuck on the platform. The growing ActivityPub ecosystem is different. I can hop over to another instance and still talk to the same people.

I can't do that with /r/DaystromInstitute. It's lost to me because I don't want to deal with Reddit. Maybe it's less intuitive--and I think nerds give average users way too little credit--but I prefer it to losing access to a community over platform decisions.

To combine what two sister comments said: you can create multiple, but you can follow people anywhere. So you don't _need_ to create multiple, but you could. Like subreddits. Some people have their "meme/funny stuff" account for reddit, and a nsfw one, and a 'news/serious stuff' account. Likewise you _could_ do that all from one account, but you don't need to.

You can have multiple accounts on multiple servers.