Heck, how many WWII movies have you seen where the hero loads up into a B-17, take off is a DC-3, and cruise in formation is B-24's?
Or December 1941 warships with radar antennas all over the superstructure?
Remember the guy in the opening scenes of In Harm's Way, wakes up on the beach with the XO's wife, takes off in his (looks like) 1941 Lincoln Continental Convertible, gets run off the road....and watch the crash.
46-7-8 Ford convertible with a continental kit screwed on the deck lid.
What's the position? "Continuity"? Sure doesn't work.
How about one of the older Scrooge movies, where he wakes up free and clear of the ghosts, starts dancing around, and in one mirror in the corner is a full length stage hand in modern clothing?
It's all entertainment, and I usually avoid it.
However, taking the grand daughters to see Ralph wrecking the Internet was fun.