I agree it’s not a healthy model long-term, just hoping it stays niche with Tesla rather than other manufacturers joining in.
In contrast, Tesla regulate all structural and HV parts. Whether this is a bad idea or not I'm not quite sure (I think the argument that HV repair is more dangerous than gasoline vehicle repair absolutely has merit), but it's a key difference.
Furthermore, while all manufacturers these days do lock down software to some degree, none do to the extent of Tesla. For example, on VW you need GeKo access for Component Protection removal, but it's $999/year and just requires a business entity. And, a few features are behind SWaP codes, but you can buy those SWaP features too, even as an independent shop. And of course, if you like you can RE the software or buy a reversed software tool suite like Abrites which will let you bypass these mechanisms without your car being remotely banned from certain functionalities.
No, they literally do not. Automakers will generally sell replacement parts for any vehicles they currently sell to anyone willing to pay for them.
In fact, they usually have dedicated sites just for buying replacement parts. https://www.toyota.com/owners/parts-service/parts https://parts.ford.com/en.html https://estore.honda.com/
In cases where the automaker won't sell replacement parts, that is because they don't make the part, but third parties do, and the part can be acquired from one or more third parties. (Note: in the case of GM and BMW, the below are third party retailers, but they also sell OEM parts, which GM and BMW do not appear to sell direct online.)
https://www.gmpartsdirect.com/ https://www.getbmwparts.com/bmw-replacement-parts
No chance of that, while most of the others have not gone full Apple in their control like Tesla has
Most of them (Gm, Ford, VW, etc ) have all signaled their desire to start down this path and many of them have removed anything not legally required to be in the ODBII spec into proprietary controls that require manufacturer authorization