The only thing that broke for me with Catalina was a single symlink on my work laptop. Aside from that (fixing it was just issuing a single command and restarti

The only thing that broke for me with Catalina was a single symlink on my work laptop. Aside from that (fixing it was just issuing a single command and restarting), I had no issues. On the other hand, there were no notable features to upgrade for.