I am bummed to say that it appears #RaspiBlitz just doesn't work on my Pi 4. It wouldn't download more than 1% of the blockchain a day, so I spun up bitcoind on NixOS and pulled the entire chain in <2 days. I then reinstalled and selected the option to copy over the chain via rsync... ~4 hours later it finished, rebooted, and then threw errors about the copied files... the ones working fine under NixOS. Time to move on... I suppose I'll try #umbrelOS this time.