I think I'd prefer a website that is decentralized by being hosted in multiple places, but still a single instance. No single entity would control it, but everyone would go to a single location to view it.
And where would the database live?
On the flip side, Micro.blog has a very different culture than Mastodon seems to[1], makes some very opinionated choices that many people might not agree with (e.g., there's not only nothing like retweets, but likes and even followers aren't public information), and of course, the easiest way to use it costs money.
[1]: Yes, I know there are lots of instances with different cultures, but there really is a kind of left-wing anarchist vibe across a lot of Mastodon; it's hard to explain if you haven't experienced it. Micro.blog comes across as generally more gentle, very conversational, and more Gen-X than millennial, if that makes any sense. (If it doesn't, sorry. Again, hard to explain if you haven't experienced it.)