I certainly hate it when shows I like get canceled and they don't get a chance to have a final episode that works as a series finale.

A challenge here for a long series though is that it's a pretty high bar to get people to retrospectively binge watch many hours of episodes. But streaming does help. (As time shifting did to some degree before.) The serial model has probably become so popular in part because it's a much better match with streaming (even if everything doesn't drop at once) than with traditional broadcast.