Well, I do use vintage vacuums as daily drivers. However, the problem I have always found is the bags & filters they use. For instance, Filter Queen & Compact/Tristar vacuums, Kenmore canisters that use 5023 bags, uprights that use Hoover C & Eureka F&G bags....I have found that those vacuums, the bags clog more easily & make the vacuum lose airflow & suction faster than new vacuums that use HEPA Cloth bags.
My Electrolux canisters are a perfect example of this. Put in a 4 ply bag, & they filter well but clog easily, have to take it out & give it a good shake, then put it back in to restore suction. Use the Type C HEPA Cloth bags for them, though, & they filter much better & last longer before losing suction. Also, call me crazy, but I do like some of the features on modern vacuums....quick release wands & variable speed controls, for instance.
Will - Vintage vacuums aren't necessarily easier to maintain or clean better than modern vacuums. Look hard enough, & you can easily find modern vacuums that are equal to their vintage counterparts. However, having said that, the older cleaners are better quality than modern cleaners, unless you're willing to shell out big bucks & buy a high end brand, like Miele or Sebo.
Rob