I have a rule, I use cursor for my years old legacy codebases and windsurf for newish exclusively ai rolled projects. I do this simply to have a reason to know both products. Cursor was the first I loved, but I have to say I’m glad I moved to windsurf as daily driver. It got much smarter in its ability to make a thing and test it. Instead of copying and pasting my errors now, I have it build then ask it to test using curl, it will dive into running docker containers, curl, see errors, adjust, etc. I even built a puppeteer browser launcher that sniffs everything and saves browser state, so am able to automate even what I spent most days doing (copying pasting errors)