There is no real abstraction layer at all. All you have to do is ensure the correctness of endianess with the appropriate calls and everything else is exactly the same. Most of the consumer ARM CPUs are little endien anyhow. Most of the issues I've encountered are usually sloppy driver writing such as taking x86 hardware based caching ops for granted and not call the appropriate cache flush/invalidate functions when operating on other ARCHs that do those things in software for DMAs.

It's called term limit. The president has it, why shouldn't the congress and the senate? These people are in office forever it's like the ole boys club. It would certainly help if they can only serve a couple of terms and get some new people in there. How old are some of these people? Seriously!