Well very modern suits have undergone an evolution that makes them less practical, but only a few decades were engineered for practicality (except the tie ... forget it!): collars that were adjustable for wind and other weather conditions, practical engineering of the joints so they didn’t restrict mobility, etc. there’s a reason why men’s’ suits in the 30s and 40s look a little ill-fitting: they emphasized function over fashion. Only the aristos (e.g. Duke of Windsor who shaved twice a day) could afford to wear something that fit like a glove...for only a couple of hours before changing.