It's obviously an outrage that #ResPublicae is still on Mastodon v3.5.
Mastodon v4 was released in 2022 but we still don't know how to satisfy some needs of ours:
1) Disable the "explore" page which pushes potentially harmful trending posts.
https://github.com/mastodon/mastodon/issues/20848
2) Avoid promoting federated accounts and posts from the front page, especially in the profile directory and explore page.
https://github.com/mastodon/mastodon/issues/22620#issuecomment-1363670888
3) A local profile directory.
https://github.com/mastodon/mastodon/issues/18078#issuecomment-2566237045
Is #glitchsoc the way to go? Some instances seem to have solved some of those issues, but not all of them.
However things seem to have considerably improved in the past two years on this front as well, so that's not a reason to delay the upgrade further.