He wrote tons of them. I find them great reads.

Here is an archive for anyone interested. I think the most interesting stuff is when accelerated GPUs started becoming available to consumers and he talks about the developments in that area. From what I recall that is in the 1997 - 1998 era.

* https://github.com/oliverbenns/john-carmack-plan

EDIT: I found one...

* https://github.com/oliverbenns/john-carmack-plan/blob/master...

Carmack also used to have some really insightful articles on AltDevBlog. I recently read his one on functional programming and thought it was very well thought out.

This site had nice re-uploads for the some of the articles. You can maybe google around and find more

[0] http://sevangelatos.com/tag/john-carmack/

My favorite is his email on inlining code: https://cbarrete.com/carmack.html