zlacker

Cheap tyre iron included with your vehicle vs nuts over-tightened with commercial pneumatic wrench ... it's not that unlikely that the tyre-iron breaks. If it doesn't you may be unable to loosen the nuts. It's pretty reasonable to call out a mechanic.

If you're doing anything complicated you have to wrangle the vehicle computer.

I expect you're right, computers will get more complex, more proprietary, less open, less likely to use open standards, companies will do more to prevent users adapting or repairing them.