I wasn't able to google it, or find a public link to the email (but it was posted on a public list) so here is some relevant snippets from it.
Nov 20 2022 titled CapROS status
"When I retired a year ago I hoped to correct some of those issues, but I want to enjoy retirement and not just have a full-time unpaid job.", ...
"I am considering just abandoning CapROS. I believe there are some useful ideas in the system, but so far no one seems to have known or cared about them."
Since it is a public list, here's the link: https://groups.google.com/g/cap-talk/c/Box4XXhSevw/m/18pUqAQ...
He posted on the list recently too if folks were worried: https://groups.google.com/g/cap-talk/c/XCBwf-zpJWA/m/6CWsNA-...