Depends a bit on the type of person and content you want to follow. But if you like retro computer Shenanigans etc. I know action retro is on Lemmy and Mastodon and I follow them on mastodon. But yes General content for the normies probably not so much.
Well running a server and no longer interacting with a service can be two different things. From an organizational standpoint I could absolutely understand them not wanting or needing the expense of another service to maintain. Even for just their own use. As long as they still have accounts and post to the fediverse. I don’t see a big issue