This! I've played with wezterm and ghostty but haven't been able to get this working there, so I keep coming back to iTerm2 for this exact feature - so that prod servers have a red background, etc.
In South Africa we've been having load shedding for a record amount of time this year. Worst it's been so far is 2 2hr slots and one 4hr slot every 24 hours (so 8 off per day)
It's not winter though, and we tend not to heat our homes like Europe.
WiFi and fibre boxes are on DC UPSs so working online is OK. Hard to do laundry and run the dishwasher though when power's only on for 4 hours at a time.
This is probably like when the security guard at the exit of a shop checks your receipt and scribbles on it. I'm sure it's more to hold the guard accountable - so they don't wave people through without some semblance of checking.