I'm really confused about this, since the creator/writer of Scrubs said that 4:3 was an artistic choice and that 16:9 would ruin the shots of the hospital. What changed?
They never said such a thing, it was cost factor, Scrubs was always cheap, NBC was not willing to put up with the cost of scanning and editing in HD. It's probably why they didn't go HD in Season 6 after the test episode in HD during Season 5 just cost to much to keep the show on air.
I seem to remember reading somewhere that the cameraman on the production shot it unofficially with 16:9 in mind, just in case a widescreen version were to ever become an option.
I've seen the Bluray versions of Season 9, and it really doesn't stand up in HD. Way too grainy in my view. Needed to be in 35mm.
Season 9 was never out on Blu-ray you're probably thinking of iTunes?
But the director of photography on Season 9 was a different person from rest of the years mostly.