No cropping, please. If I'm paying for the whole series, I don't want 30% of it missing, thanks!
If you want your screen filled for whatever bizarre reason, then use the zoom function on it, rather than vandalising the show for everyone else.
Well, if they have to scan the film reels, they have to redo the cropping for every shot anyway.
"Redoing" the cropping isn't what takes time or effort. That would be automated. As I understand it, the show was filmed 4:3 with safe zones. They'll simply match the original crop.
Creatively "reframing" the whole show for 16:9 would take time (and therefore money), and would probably look terrible anyway.