I don't think there's even a plan for a v4. The fallout from 2 to 3 was that bad. So to keep improvements going takes deprecating something several versions bef

I don't think there's even a plan for a v4. The fallout from 2 to 3 was that bad. So to keep improvements going takes deprecating something several versions before removing, and research is done to find how popular that particular thing is to determine its candidacy for removal. Thus it's best practice to pin all dependencies, and read the release notes before doing a version update.