They didn’t forget. They’re working on it. Some people found that the plug-ins don’t work with 3.6.1, but I got it to work. See: Unable to install OpenVINO Ai Plugin on Audacity 3.6.2 and 3.6.1 - #5 by sefufu
Interesting: when I reverted from 3.6.2 to 3.6.1, the legacy limiter that came with the former was still there.