Agree...

As an embedded developer for over 25 years, I would never use the provided hardware abstractions from one particular vendor. Typically, you use your own abstraction layer over multiple vendors BSPs/OS/libraries.

One of the driving principles behind embedded software is minimalism because you pay real money for every byte and cycle. That leads you to creating minimal abstractions for your particular use case that still gives you the flexibility that is also often required (multiple sources for processors for example).