Sometimes people will make blog posts or youtube videos about the most exciting new features in a release. You can always go through the release notes for a given version, but it can be a lot and it's not necessarily obvious what the implications of a given line are. For example, "$NVIM_APPNAME" is a pretty opaque changelog entry that actually has some really neat applications as a config switcher.
My personal picks for things that have been interesting to me as a user are: