if i remember correctly, I upgraded from PL3 to PL5 for new features plus better denoising, but also because of new camera that PL3 didn’t get.
doing a search for PL version and new camera/lens profile bring up a lot of discussion thread, where it already discuss that new camera/lens combo are supported for new PL version and don’t apply to old one, so if you buy a new camera that just been released by Nikon or Canon (to name only those), you’ll need to buy a new version of PL as the old version don’t get it, but if PL has the camera body profile you’d get the new lens profile for older PL version
like this one from 2021:
but this thread tell about new camera body added into PL only on new PL version and not older version:
scroll down and somewhere you’ll see this:
