Specifically for Piefed/Lemmy, I have all the experience and knowledge necessary to self host my own instance. I've been managing servers since before half of Lemmy's population was born. And what it has taught me, is it is always better when its is someone else's problem. My home lemmy instance closed down, which could have been a chance for me to self host, but I, instead, spent a little time finding another instance I liked, because I didn't want to be responsible for it.

I actually own a domain with the idea of starting a Piefed and Mastodon instance, but I've never been willing to set it up and deal with the overhead. Maybe one day I'll decide to, especially if feddit.online ever goes offline, but for now, I enjoy it being someone else's problem.

Also, I'm pretty sure the fediverse wouldn't work if everyone had an instance of 1. Maybe some day someone will crack a fully distributed P2P ActivityPub like solution, but until then, the health of the swarm requires we stay somewhere between "1 company runs everything" and "there are 7 billion fediverse instances".