I can confirm and I do use this feature of jellyfin. It works great. The reader is unusable. I use Librera for reading. It’s great, free, and open source.

So my flow is biblio, mam, library Genesis, Anna’s. Then to jellyfin folder that it reads automatically. Then I can download that to any device connected to the jellyfin server. Local is easy, abroad through tailscale.

I use Doku at work and can attest that it is easy to use and works very well. Even for industrial applications.

Nope. I was in your position with a Pi400, got tired of the poor performance with streaming UHD stuff across multiple devices and went with the ser. I now have a ser 5 and 6, and they are beasts for their size.

I have one of these and it’s outstanding:

https://www.amazon.com/Beelink-SER5-5560U-500GB-Computer/dp/B0B3WYVB2D