I have to support the amazing independents doing a better, more thorough job than most main dealers ... BUT ... most billies ( customers ) have been programmed to only accept main dealer stamps, regardless of age of vehicle .. it all a load of bollocks but that the f..ked up world we live in !
I run my own garage, can and do carry out services and warranty work always using original parts, but I'm not blinkered enough to believe it beats a fully stamped book from the dealer. For a 15 year old car, folk still moan if there's one indie stamp in the middle from six years ago
I also buy cars and with that hat on, prefer the OEM stamps. That said, I will still service any car, even if it was recently done, as it is me carrying the warranty and not the 12 year old 'technician' at most dealer workshops.