Oh, all along I thought the request was to separate z-power riders from power meter riders, as some z-power riders have their set ups wrong and the power riders can’t keep up. But if the plan is to just allow categories, such as:
Training, no leader board
That would be just like Strava premium letting me see my age group on leader boards. That would allow me, on a z-power set up that produces speeds/rankings 10% lower than I see in the real world, a chance to compete against similar strength riders, regardless of if they’re on z-power or power meters. The current flier flagging will still work to notify all fliers, be they power or z-power
this whole separate leader boards for an arbitrary item of trainer type, rather than cheating vs not cheating, seems to be quite a red hearing.