I was in an exit row seat on an AF flight from Bangalore when a woman asked if I’d swap with her husband, and he’s in Premium Economy. I actually don’t like their PE much because of how the seats slide and there isn’t much leg room so I wasn’t sure, but I decided it was probably neutral for me and would make them happy so I said yes. Then when he took me forward it was a bulkhead PE seat that had plenty of leg space! Unmitigated win for me.