> Hardware intellectual property has an insane number of working parts and "factors" (electrical resistance, photo-lithography, metal layers, silicon is amazing

> Hardware intellectual property has an insane number of working parts and "factors" (electrical resistance, photo-lithography, metal layers, silicon is amazing) all have to be solved. Again, fabless companies don't have to do any of this. You get a PDK from the factory which provides all these parameters and even standard cell libraries so you don't even have to do circuit design. You just feed your logic into "compilers". You need "physical" designers to optimize the output of those stages, but these are not people looking at the physics, they just optimize P&R and floor plan according to the PDK specs and tool output basically to close simulated timing. In practice once you get to a large enough and high performance product, you would need custom circuit designers. And step up even larger again and you'll likely be working directly with the manufacturer on defining and tweaking the process. At Apple scale, you probably even define your own custom process node. Once you get to this scale though it's pretty much like big software houses writing their own libraries or OSes or compilers or asm code because the standard available stuff is not quite enough. That all takes a lot of engineers too. But that's not _required_ and almost certainly PA Semi would not have had a whole lot of engineers on that work, it would have been logic, analog, PD, V&V, power, primarily. And almost all would just work on the standard package they get from their fab. So mostly writing "software". And you don't need any money for a develop,release,iterate cycle on most of the hardware stack because it can be and is simulated.