Did this get taken down for some reason? I had to hit the wayback machine to read it.
It mainly seems useful as background for understanding future attacks, as opposed to being of immediate pragmatic interest, but it was a very interesting read from that perspective.
The paper is scheduled to appear in ISCA ’22, which is not until June. I’m guessing publishing the paper on their site might conflict with the submission guidelines of the conference.
I also mirrored it here: https://git.hardenedbsd.org/shawn.webb/texts/-/commit/28a86f365f92a0b5a6351227a4f255fc1cd785a4