14 years, 51k comment karma. It definitely feels very strange to leave it all behind.
I used to have an occasional habit of scrolling back through my own comments. It took me a long time to understand why. I don't really participate in real-identity social media since I stopped using Facebook like a decade ago. So as an avid commenter for so long, my Reddit history is pretty much the most thorough and incisive chronicle of my own thoughts and evolution as a person. Almost a memoir. Seeing the types of stuff I was into, the way I thought and wrote, my opinions on the world, and how they changed over such a long period of time is really valuable to me.
Fortunately you can file a GDPR request and get a copy of the whole thing for yourself.