Like you say, it's just not practical. For example, while I am a fan of Blade-Tech's 'Classic OWB', I'm not a fan of my Blade-Tech 'Total Eclipse' for a 5" 1911. Sure, it's built for a 1911 pistol, ambi-capable, and with a sweat shield, on both sides, to keep the thumb safety lever from inadvertent manipulation, and it does accept just about any 1911, but it's a gun bucket - the retention is just not there.
Never mind the roller-coaster test, I wouldn't trust this thing with a summersault test, and you might even be better off with a 'locked' race holster. I am, of course, assuming that holster retention matters to you; it does matter to me, so I don't use my 'Total Eclipse'. If ever there was a niche for a 'custom' (Kydex/Boltaron) holster design, an ambi-capable holster, with a high sweat shield, on both sides, to keep the thumb safety lever from inadvertent manipulation, and built for a 1911 pistol, might be that niche.