Rotor 3D+ will happily swap between BB30 and BSA, just pull the left hand crank arm off, remove, add or remove the 11mm spacers (literally large plastic washers), put on the other bike.
Not that I would choose to do it often myself, but then I don't share wheelsets between bikes either.
I'm planning on buying a Power2Max with a Rotor crank and swopping it between BBRight bike and BSA bike, nice to know it seems relatively easy enough. Will probably only need to swop it twice a year (summer/winter)
Rotor 3D+ will happily swap between BB30 and BSA, just pull the left hand crank arm off, remove, add or remove the 11mm spacers (literally large plastic washers), put on the other bike.
Not that I would choose to do it often myself, but then I don't share wheelsets between bikes either.