Depends on how you define 'fashionable'. Current trends, who's building what and who's not building what? Because when it comes to coasters, how much scope is there to be fashionable with features - you have to admit, there is only so much that can be done.
If parks are looking for publicity, a good advertising spin etc etc, then height and speed are the obvious ones to go for. Maybe after Collosus opening, it's emerged that inversions really aren't that special any more - there's not much else that can be done with it. It's all very well having a normal coaster with inversions in - nowadays, there has to be more.
This topic comes up after a year of launches and another big UK launch debuting next year. Before this year, the UK didn't really have a big launched coaster, so maybe it's more of a case that the launched coasters have become very fashionable - whereas inversions will remain the dependable classic - there needs to be more to a coaster for it to be world-class, but a coaster with some decent inversions in is generally a good ride.
Call launches a fad. There's only so high and fast they can go. :mrgreen: