I have no idea. I have a computer science degree and I could only ever hope to understand it with cute metaphors.

So for my cute metaphor, which I look forward to improvements, I think of the general problem as "we need to run a business" as an analogue of "we need to run an operating system and some programs"; the machine architecture is the amalgamation of tools and techniques.

So if a business springs up as the form of a restaurant, and that business as operating system learns how to create successful patterns using spatulas and fryolators and hot plates, then to move your business to a farm that has tractors and shovels and troughs, you basically have to start all over with your implementation even if your business plan is the same.

But, as those patterns become satisfied, of "get my pile of stuff moved from this container to that container", the issue of plates and troughs becomes solved and you get rapid springs forward of completing your task of migrating.

I have no credentials to answer this basically but that's how I imagine it.