@gavjo Nothing to look out for as such, but here's my own personal user experience of actually owning a Golf RLine Mk8 2022 version.
I own an automatic 2022 Mk8 RLine from new in May '22.
My experience with the car is that it just works.
It's updated itself over the air a few times, and is currently at the latest version of its software.
In all the time I've had it I've had no problems with software or control whatsoever. After each major OTA software update I haven't noticed any difference between the previous software and the new.
It averages 45 mpg over its current ~28,000 mile life, and I can achieve 65mpg on a steady long run.
I would happily buy another from the same period or later - I can't offer comment on anything earlier, or cars I haven't owned, apart from my previous Golf Mk6 which is still going strong, without issue (>160,000 miles and counting) now in the ownership of my son.