I was in in the `concat->copy->[Claude/OAI]->paste` workflow until a few weeks ago. Cursor is a revelation. Nowadays I only very rarely pump things wholesale into Claude[dot]ai when I'm dealing with a massive cross-codebase issue. Otherwise Cursor is my salve.
Had the same experience. Cursor ux and also Zed are designed to make copy pasta'ing back and forth obsolete. It's certainly more comfortable to iterate within the IDE, for me.