The persistence of the word "film" where no actual film is involved always struck me as odd. We also have the handy word "video" to describe the current media. The term "tape" also persists for no apparent reason, which is weird, since hardly anyone under the age of 40 has even touched a reel of tape.
Reel is tape exists in cassette tapes as well which would frequently be pulled from worn tape decks. Something my 36yr old sister is quite acustomed to.
I'd say 30yrs or younger is a better estimate.