On the old zap.stream, whenever I try to add a server it just buffers interminably. Is that issue fixed?
Discussion
Add a server? what do you mean by that?
Media servers

Currently we only support NIP-96 on zap.stream for uploads so you can only add a compatible server, it also must return the correct tags during upload or we wont know the resolution
Any servers you recommend besides these two?

Check https://blossomservers.com/ i think anybody running route96 should work