> a place that did 100% pair programming with rotation every day

Sounds like a nightmare. I interviewed once for a company where the team did exactly that, and it was the moment in the interviews I realized I don't want to work there.

ad-hoc peer programming is perfectly fine. Debugging something tricky or helping someone ramp up is great. But peer programming as-a-process is literally peer-micromanaging and outright insulting IMHO.