Q: People who are really serious about software should make their own hardware. Why?
Alan Kay: The first part of the idea is that computing is about -processes- (all kinds) both understanding them and making them.
At the next level of practicality, if one is making something that is supposed to be good for people to use — that actually might help them in important ways — then the design needs to be in terms of humans-with-processes, and shouldn’t be limited by the particular hardware (and programming languages and systems) that vendors might be supplying.
Finally, a new good and needed idea might not run fast enough or simply enough on existing hardware/software systems.
In all of these cases, computer people should be able to deal with all the levels of organization needed to create the desired art.
This is how personal computers, bit-mapped screens, the Ethernet, the Internet, smartphones, microcode, FPGAs, and (going way back) programmable computers got invented.
https://www.quora.com/People-who-are-really-serious-about-software-should-make-their-own-hardware-Why