TBH I haven't ever had a problem with SD card corruption so far. If I did, it wouldn't really matter, since all the important data is on the RAID array, and the OS can be reprovisioned if needed.
Performance proved to be an issue for SD cards though, when attempting to host nextcloud and postgres. I do what teh_klev is talking about and selected the fastest USB stick I could find, which was a Samsung FIT Plus 128 GB Type-A 300 MB/s USB 3.1 Flash Drive (MUF-128AB), and this gave me a huge speedup.
Unfortunately Jellyfin is not really fast enough on an rpi and I have no solution.
Performance proved to be an issue for SD cards though, when attempting to host nextcloud and postgres. I do what teh_klev is talking about and selected the fastest USB stick I could find, which was a Samsung FIT Plus 128 GB Type-A 300 MB/s USB 3.1 Flash Drive (MUF-128AB), and this gave me a huge speedup.
Unfortunately Jellyfin is not really fast enough on an rpi and I have no solution.