After successfully installing the Mastodon 4.3 beta on a FreeBSD Jail (I’ve taken notes for some changes I’ll make to my blog post, but that will be when it's officially stable), I tried updating an old instance that started with Mastodon 4.0.x and was currently offline and stuck at 4.1.x. I upgraded to 4.2.12 and now it’s on the 4.3 beta. Everything seems to be running smoothly.
In the coming days, I’ll test replicating the changes from BSD Cafe (default theme, character limit increase, more options for polls), but I don't anticipate any issues.
The BSD Cafe instance will be upgraded when everything will be considered officially stable.
Stay tuned!