I think moaning about shoulderpads going on for more than a season, or two, as if that's boring, is pretty ridiculous, TBH.
Shoulderpads aren't, historically, a fly-by-night type of fad - the last time they were in, they were in from the late '70s through to the early '90s; so about 14 years!
Albeit that the shape and size varied during that time.
Every jacket and coat and almost all tops had shoulderpads added, just as a matter of course.
In the case of very basic trends, such as shoulderpads, they shouldn't just be switched on and off again, randomly; they should reflect the ongoing zeitgeist of the time.