My 11 year old had little interest in World War II until he saw the series “World War II in Color” on Netflix. He’s watched every episode and now reads books on the subject.
The thing with "modern" quality is that it distracts so much less that it becomes far easier to consummate. And that does not just apply to young kids but to me as well.
So I don’t mind the old stuff, it does not distract me at all.
But I can understand that if you only experience 1080P and above your whole life, 483 lines in b&w is distracting.
Which show did your children gravitate to that’s been colorized/upscale? I want to see if it has the same effect.