That's really my point as well. The modern updates of ships are because our expectations have definitely shifted. I feel like disparate design languages of the shows don't necessarily have to detract from the shared universe. Though, don't get me wrong, Star Trek is many things but one thing it isn't, and has never purported to be, is a documentary. By that I mean that the set dressing, the costumes, our "presence" as the audience, everything about the way the shows are produced tells me we're watching a dramatization of the "real" events. Contrast that with something like the 2000s era Battlestar Galactica which had a lot of elements in its filming that were designed to make it feel more like a documentary and we, the audience, were watching footage captured of "real" events.