The movie I was watching today that prompted this thread was "Land of the Pharaohs" (1955), a sword-and-sandal stinker (notable for a very young Joan Collins in a brass brassiere) filmed in glorious
Technicolor that didn't make it to TV until well after RGB CRTs were ubiquitous. I must have seen it either at the theater, or on a color TV--but I distinctly remember it in B&W.

The original series Star Treks were all filmed in color but I never watched them when they were first broadcast. But when I see them now, I am always startled to see they are in color! I remember them as being B&W. I may have watched a few of them on B&W TVs when I worked overseas, but not all of them.

Your other remarks do make sense. I too have the special edition of Wizard of Oz and have also noticed the improvement in resolution and the color enhancements. But I still remember seeing the movie in B&W. I think I may be on to something.

In a possibly-related development, my dreams are always in vivid color. I understand most men dream in black and white.

"If you took all the girls I knew when I was single
brought them all together for one night
I know they'd never match my sweet imagination
Everything looks better in black and white."