Dude complaining about a dude complaining about apple being proprietary in 2024, when apple has built their entire business from day one by being the most draconian closed loop proprietary hardware/software model since personal computers were invented........
You just made the same argument, but in an aggressively dumb way.
Yep, that's a tapered/angled roller bearing. They're conceptually a pretty easy concept, but deceptively hard to manufacture