ONLYOFFICE VS jellyfin-server-freebsd

It works in Windows so you can try it: https://www.onlyoffice.com/

Excel might not work, but [ONLYOFFICE](www.onlyoffice.com) is almost a pixel-perfect alternative.

If you want an open source option for editing office documents I've used OnlyOffice with NextCloud and it works pretty well.

Only Office

OnlyOffice is a good MS Word alternative: https://www.onlyoffice.com/

I use onlyoffice[0] because MS Office doesn't run on Linux. It is open source and seems to have the best compatibility with MS Office. You can self host it and/or use it locally. It also integrates with e.g. nextcloud or seafile.

Some features are missing yes, but the usability (IMO) is better than Libre-/OpenOffice.

I don't know how good the collaboration is but they seem to advertise for it.

[0] https://www.onlyoffice.com/

Yes, they don't even have to reinvent online office. They could use something like https://www.onlyoffice.com/ which is open source and can be implemented in a browser.

There's OnlyOffice though I can't vouch for its quality as a multi-user docs / sheets replacement; I've only used it offline.

I can't speak with first hand experience on the TrueNAS Core issue. But it took me 10 seconds and the first Google result to find this: https://github.com/Thefrank/jellyfin-server-freebsd

1) https://github.com/Thefrank/jellyfin-server-freebsd

It's probably easier on Scale since there are official Jellyfin builds for Linux, but if you want to run it on Core you should have a look at https://github.com/Thefrank/jellyfin-server-freebsd/blob/main/Installation_TrueNAS_GUI.md

There's an unofficial FreeBSD port, and they have a guide for installing on TrueNAS Core.

FreeBSD tarballs and txz are updated: https://github.com/Thefrank/jellyfin-server-freebsd/releases/tag/v10.7.5