The conventional reserve amounts account for diversions such as an airport being closed, or weather conditions at such as crosswinds exceeding the aircraft's ca

The conventional reserve amounts account for diversions such as an airport being closed, or weather conditions at such as crosswinds exceeding the aircraft's capability to land at that airport. Another case is unexpected headwinds using up fuel, losing an engine, or going out over water and needing to turn back half way. If you're going to make VTOL exceptions, you still can't just punt and say put it down anywhere. What if you're over LA and there's no clear spot for miles? Over water? In instrument conditions (necessary for scheduled flights, because weather) and you can't see below you? Not saying we shouldn't amend the FARs for new aircraft types, but there's some thinking that needs to go into them.