I'd like to think... hella improvement. I'm currently rewriting a story that I started 6 years ago, and seeing how cringey my writing -- I'd say, it improved quite a lot. I used to write too many dialog and use the same word again and again (and, yes, again). Now, though, even when my vocab literally diminishes, I still try to find ways to describe things -- though haven't been writing in a few years, so kinda still crawling my way back.
On the other hand, genre-wise, has been the biggest change. In the past, I only write romance and BL. A lot of them were angst with unnecessary character death and sad emo kids, thinking that happy endings aren't superior endings. Now -- I can't kill even one of my characters. They are all my children. I love me some happy ever after. Also, I never dared to write Fantasy, thinking that worldbuilding is too hard and all. Now, Fantasy is something I'm kinda really digging.
So, yeah. I evolved to my true form. I was a Pidgey 8 years ago. Now I'm Pidgeot.