Though, as other researchers have noted, they tend to give partial fixes for chains on older versions. That is, they might backport a fix for the zero click bug

Though, as other researchers have noted, they tend to give partial fixes for chains on older versions. That is, they might backport a fix for the zero click bug but they may not kill other less pressing issues like privilege escalation/sandbox escapes. I've seen this with a few of my own chains too. Personally, my security bet has just been to stay at the absolute bleeding edge and install betas on day one. You'll get security patches first and, for the most part, many exploits are brittle enough that they tend not to work perfectly on newer, unseen versions of the OS and so you do have a slight advantage there.