IME at about 200 watts you can easily pick up a half mph (probably more) on a modern bike with aero (50mm) wheels and a shaped downtube. 200 watts is probably just shy of a 3 hour metric century on a modern bike for my body. You don’t need to ride 25mph plus to get tangible aero benefits and to me a half mph is tangible.

Ride whatever you like (as I usually do) but for me my vintage stuff is for riding on the relaxed side of things. As for looks it is like trying to compare a P51 to an SR71. Both are cool but different.