[James2001]

Sometimes streaming services are limited as to what they can do, if they're supplied with x generation prints that are old, faded, tatty, originally made for "this film has been formatted to fit your TV" marketing junk and it looks like its seen better days, well nothing you do is going to make it any better whatever you pump it out as.

They could still put out 50/60i content as 50/60p rather than 25/30p (which is what I'm referring to as inferior to TV and physical media) as virtually everyone other than the iPlayer does, that alone would put out a significant visual improvement on that content (not just in terms of movement, but in getting back the lost resolution from throwing away half the fields, which also affects 24/25/30p shot content mastered in 50/60i).