The majority still use bluesky PBC's infra but that's increasingly less true.

- Blacksky has their own full appview for bluesky nowadays + relays and PDS w/ something like 60-70k users. It's small compared to the total bluesky count but it's still very sizable.

- There are countless atproto relays running independent of "big bluesky" and they only cost like 20usd/month max nowadays to run.

- Likewise it's trivial to host your data on any thirdparty PDS and scaling up a PDS community isn't terribly hard (PDS scale linearly up to like 500k users and then it scales linearly past that by just periodically launching a new PDS part of your "cluster")

- And most importantly the UX on migration is getting a lot better so it's reasonably approachable for average users.

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Side note but I noticed your name. Are you "the direwolf20"?