I ran a dual boot on my work laptop with Windows and Mint until I was fully ready to transition over to Linux. Might be worth doing the same? Recently got rid of the Windows boot and am now fully on Linux for work development. However, I’m not in the web development space so can’t comment on that. I use CLion, Intellij, and PyCharm for work.

My home pc is fully Linux running Fedora which I use for gaming, no issues there running Proton through Steam. Have Lutris setup as well for League Of Legends, although that’ll be disappearing once Vanguard is integrated.

My raspberry pi 3b+ could absolutely direct stream 4k locally, transcoding is a different story. Is your pi connected via ethernet?

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I use NZBGeek as my indexer and Frugal as my newsserver. Have been happy so far.

There’s definitely alternatives to the Jellyfin UI, there was one that popped up here a few days ago?