My understanding is ES2015 was huge, but E2016, ES2017, ES2018, etc. are comparatively tiny.
There are many proposals sitting at the cusp of the stage 3 to stage 4 transition. There will be a couple more meaty things to make it. I suspect we'll end up with more proposals ready than I have time to integrate into the main spec :)
A small update is just as important news as a large update. It's a signal about where Javascript stands as a language.