If an alien came, saw the 1st Land Cruiser, then saw a 200 Series, he'd say "It's not a LC"
If he saw the 1st Surburban, then a 2020, "it's not a Suburban"
If he saw an 1860's steam engine, then a maglev bullet train, "it's not a train"
Definitions change, we may not like it, but realize us...