I think I also ran into complications due to the RPi 4's architecture. Maybe I was following bad instructions. I don't know. At the end of the day, on this hardware, the juice just wasn't worth the squeeze anyway. I'm sure "where there's a will, there's a way," and that's where things broke down for me...
...I mean this in a sportsman-like, friendly-competition way, not a snarky-jerk way:
I ended up fixing it with ```fd --base-directory / monero -x rm -rf``` :wink:
✌