This tweet share on HN may need some explaining or instructions. It appears to be highlighting a tweet that links to a Facebook story, but reading through that story, I don't really get any sense of Apple's migration through CPU instruction sets. Glancing back at the tweet, it might have a thread of comments where the M1 is discussed, but I can't really follow it, so I'm not sure.
The tweet also links to another tweet [0], which links to a GitHub file [1] with the story referenced in the title.
[0]: https://twitter.com/brockgs/status/1330711644977053696
[1]: https://raw.githubusercontent.com/ESWAT/john-carmack-plan-ar...
btw the text file is from the John Carmack plan archive: