I started cruising with Radisson and then Regent. What I liked was more space, fewer passengers, good food, shower stalls, and ,at that time, a typically low single supplement.
With the advent of the included excursions the supplement is now 100% and the excursions are fully booked 4 months in advance.
A Deluxe Verandah on HAL comes close to the old days with a smaller shower stall and
a lot more people.