Mastodon✨ A new release candidate for Mastodon 4.0 is now available for testing! We are planning to release the stable on Monday, along with some important security fixes. Stay tuned!
Nasher 
Masto.host@Nasher I only install stable release on Masto.host unless there is some problem.
Only when Mastodon make v4.0 a stable release will I start to test it and all going well 24 to 48 later, you will have it installed.
@mastohost I perfectly understand it's safer not to play with "testing" branches and release candidates in an infrastructure with the size of yours.