I've been running a Pi 4 as a home server for a few years. When boot-from-USB became available, I moved to that, with a good-quality USB thumb drive for boot/ro

I've been running a Pi 4 as a home server for a few years. When boot-from-USB became available, I moved to that, with a good-quality USB thumb drive for boot/root (I've had had SD card issues in the past) (and also speed, though I doubt it makes much practical difference). A couple of weeks ago I started getting intermittent disk errors. I thought it was the USB drive, so I cloned it (still worked well enough on my laptop) to another drive. Same thing happened. So everything points to the USB controller glitching out. Have gone back to an SD card, and everything seems fine.