And of course, then you've got the international markets, where the trend towards 'long form narrative' in mainstream drama programmes had usually already been established by the time North American television began experimenting with it.
In Quebec case, the shift happened in 1986 with Lance et Compte a series about... hockey. It considered as the first "série lourde" (heavy series), because there was action and bigger budget. Before that, that kind of ambition was only for movies or foreign series, the tv dramas were only téléromans (telenovels, pretty close to soap opera). Lance et Compte was also strongly serialized, each season was built on its own story-arc.
Thirty years later, serialization in Quebec/French-Canadian television didn't progress that much. The market isn't safe enough for that and a tv-show (except for comedies) is rarely written by more than two persons. Cliffhangers are quite common, but it's not a good idea to end a season with too much unresolved plots.