I don't know what's it like to work with their chips, but I worked at one of them designing chips. There is often a block designed by someone 10 years ago but left the company, it has bugs, but nobody dares to touch it and fix it because "we knyiw ots bugs" and nobody really knows what's happening under the hood. So someone writes a wrapper for the next gen, to add new features. This person soon leaves the company.. rinse and repeat. I've seen wrapper of a wrapper of a wrapper on 10th gen of a product in 5nm process of a product line started its life when 90nm was state of the art. Most of the the bugs accumulated over the years were still there. They won't fix it as long as a big customer doesn't complain about it.