More like https://discourse.org/. You can run it yourself, but you can also just have them ding a credit card every month and not think about it again. Wordpress has Automattic, and I'd like to see the same for Peertube and Mastodon. With Mastodon, one can then go to folks and say, "Heh, here is a turnkey solution to migrate to for your 1:many and social interaction needs, fully managed." As long as these applications support an S3 compatible target for backups and restores, portability is a database and object backfill and DNS switch away. If you want strong durable storage, the Internet Archive has Vault, a product that can act as long term storage of last resort for digital preservation.

Lets Encrypt serves nearly 192M websites with 13 full time staff and an annual budget of approximately $3.35M, for example.

I am using https://masto.host/ for Mastodon and https://elest.io/ for Lemmy. They are fully managed.

I'm not worried about who owns my data, but I do want to have a stable identity. The first Mastodon server I signed up with mysteriously disappeared after a couple of weeks, so I decided I was better off paying a small monthly fee to put it on my own domain.