[Michael Phillips] “Also, the .1% slow down was not so much a shortcut than a solution….”
In the PAL world they engineered colour properly so there was no need to do the NTSC shortcut. Old B&W TVs still worked when PAL went colour (spelling intentional). And it was really a shortcut. If they had thought through the ramifications of altering the real time relationship the ongoing issues we all suffered of dual timecode formats and sync drift could have been avoided.
My father designed microwave links including broadcast TV links in the 60s and 70s. I’ll take his word that it was a shortcut solution and poor engineering decision.