John Carmack's arguments against building a custom XR OS at Meta

I've written a lot of low level software, BSPs, and most of an OS, and the main reason to not write your own OS these days is silicon vendors. Back in the day, they would provide you a spec detailed enough that you could feasibly write your own drivers.

These days, you get a medium-level description and a Linux driver of questionable quality. Part of this is just laziness, but mostly this is a function of complexity. Modern hardware is just so complicated it would take a long time to completely document, and even longer to write a driver for.

Yeah reverse engineering all the drivers is going to be a huge headache.

Sounds like super fun if I could be paid a bit for it.

What is an easy gate task to get into “reverse engineering some drivers for some OS”?

Second thought: I don’t even know how to write a driver or a kernel, so I better start from there.