tricky 

Ha, agreed.
Splined cartridge bearing BBs were "meh." It just seemed to make everything more proprietary

I don't mind external bearing cranksets but they are more needy when it comes to parallel BB shell faces. It's nice not having to worry about getting your spindle length right.

Press fit? No thanks! Seems like there's some pushback in the industry and I have seen a couple new "standards" that are threaded. It would be hilarious is we one day end up with a new "standard" that is a threaded cartridge BB with an integrated spindle with taper interfaces to the crank arms. Except it's proprietary and has flashy bike industry marketing. Lock-in Power Interface Bluetooth Bottom Brackets™ by Specialized