Jellyfin user with a relatively large library here. I am not having any crashing or hanging issues, did you use the Docker image when you tried it? Can't really speak about the plugin support since I haven't used Emby.
Haven't tried Docker, ran it on both Windows and Linux, on the same machines that Emby ran on. I tried it for a while but it was too unstable and I kinda gave up - switched back to Emby.