There is still quite a lot of new electronic stuff worth listening to. Lots of it is derivative, but that has always been true for most pop music styles.
Whatever one may think about it, stuff like barker, raim, empty set, Laurel Halo, all sound very much post 90ies (the period I was a teenager, and started to listen to tons of electronic music).
That said, I wouldn't say things are standing still either in club music. I don't pretend to have been to a club in the past 5 years or so, but even though they played roughly the same genres there's definitely a difference in depth between the acts we danced to in the 00s and acts like Major Lazer and The Weeknd.
Maybe the genres are just sticking around longer and go through subtler changes. If you let teenage me hear Despacito I would've liked it but wouldn't be surprised. Major Lazer though would've blown my mind.