OPEX is not my ceiling, it's the acquisition. Even when you look at something like a Cirrus, the financing costs dwarf its operation costs. Yet people think, fuel bladder replacement or retract gear maintenance is blasphemy and somehow the inflection point that determines whether or not someone can afford to own a 750AMU airplane? Literally, look at the gear endangered species thread, you'd think the children are going hungry because of a gear swing, so let me buy a new SR/TTX to save money? That's some common core math right there..
For some, it's not the cost of the fuel bladder or gear refurbishment. It's the scratched trip if you walk into the hangar to a blue puddle or you land with a 'gear unsafe' light.