I totally agree. The aircraft is better at checking these things than we are and as you say, the flags appear before you become non-RVSM compliant. But what you forget is the the bed-wetters in one of EASA’s numerous Flight Prevention Departments insist that their procedures are followed by us all. Quite how we check as pass FL280 with possibly 2,500 fpm or more I’ve never worked out. But obviously we do these checks on every flight.
PM