> You don't - you NEVER - develop to the details of an architecture.
You don't try to develop to the details of an architecture. You even try not to. Then you try to run it on a different architecture, and you find (some of) the places you developed to your specific architecture even though you didn't mean to.
And that's why Linus is right. It's easy to be architecture-specific by accident. It's really hard to not. And it's going to take time and effort to go to a different architecture. In the real world, few people want to waste their time doing that.
You don't try to develop to the details of an architecture. You even try not to. Then you try to run it on a different architecture, and you find (some of) the places you developed to your specific architecture even though you didn't mean to.
And that's why Linus is right. It's easy to be architecture-specific by accident. It's really hard to not. And it's going to take time and effort to go to a different architecture. In the real world, few people want to waste their time doing that.