https://www.fibermc.com/
The minecraft server now runs fabic.. while I think we all generally like to stay up to date AND close to vanilla there are some fabic mods I think would be worth adding..
Of note I use a tool that can auto update / load modes from https://modrinth.com/ so if a mod is not listed there it would need a manual install.
Performance:
I am considering adding Lithium https://modrinth.com/mod/lithium as it may improve server performance.
Teleport:
We already have vanilla tweaks spawn, homes and TPA but I think everyone wants some form of managed / central portals or something.. It looks like there are a number of options in Fabric https://modrinth.com/mods?q=teleport&g=categories:%27fabric%27
Waystones looks like of cool https://modrinth.com/mod/waystones
I don't have time to test and research everything but welcome feedback and suggestions.
Hmm there are multiple fabric discord chat integrations available.