Heh, I know the feeling. I have three retired Pi systems (two OG units and a 1B+), but I have three running 24/7 as well: first is a 2B+ running OSMC as my media center. The second one is a 3B with a sense hat, running rtl433 and MRTG to graph outdoor and basement temperature and humidity received from transmitters on-premises, barometric pressure from the hat (and also displaying data on the LED display). The last is a 3B+ running Home Assistant.
I've been - cross my fingers - lucky with MicroSD cards (usually Samsung, sometimes SanDisk), but having USB3 on the new model is quite the game-changer.
ETA: I do have rsync backing up my Pi setups, so losing a MicroSD would be merely annoying rather than catastrophic.
I've been - cross my fingers - lucky with MicroSD cards (usually Samsung, sometimes SanDisk), but having USB3 on the new model is quite the game-changer.
ETA: I do have rsync backing up my Pi setups, so losing a MicroSD would be merely annoying rather than catastrophic.