Er, yeah, that's where I was going, should the answer to my query be "trying a Mainline kernel is OK until 24.04.4 comes out and I can get official support for the kernel rev I need (6.17)". I have no personal interest in kernel building if I can possibly avoid it. If I did, I'd probably be staying on Fedora rather than pulling an Ubuntu LTS "Back To The Future" move in order to get official vendor support for Steam and ROCm (both of which are currently causing me grief).
My original query was less "how do I do it" than "what have been the [stability|security|etc] experiences of others who have done it".