> how easy is it to administer for clients outside of my network or possibly even outside my country?
You can run Jellyfin in any docker container. If you want to run it on a NAS in your home office and put it on the internet through ngrok or tailscale, you totally can. But you can host it pretty much wherever.
> how good is the app support? I transcode all of my media to AAC and h264 for compatibility
The official clients are just ok. They'll support all the file types you'd expect, but they're fairly slow and not great at streaming 4K. I pay for a client (Infuse Pro) that addresses a lot of those pain points, but it's been relatively poor at auto-detecting tv show metadata, so I'm still in the market for an app I'm happy with. Ideally an open source one.
> - what about for streaming music?
Technically works, but whether it's a good experience depends on the client you're using.
> - what do you like the most about jellyfin
Easy to set up. Great plugins for finding subtitles/artwork/metadata. Open source with good docs. Works with lots of clients. Easy to create and share accounts, and has fun features like synced remote viewing parties.
- what do you miss most about Plex?
The ads. jk never used it.