I have the same feeling. Started a project with node4 not too long ago (1,5 years when I think) and haven't touched it for a while. Amazing to see that it's now already 4 major versions behind, and when I get to work on it again probably even more.

The positive thing is that they probably didn't remove or deprecate a lot of APIs, so I guess upgrading my own stuff is most likely not a huge effort. The bigger fear is how all the third party dependencies might cope with a node update.