I extremely dislike that I can't use vite with @web/test-runner. It runs its own thing, which means I have to use a different pipeline than the one I already use to build the app.

Both Cypress and Playwright can use vite out of the box, on the other hand. I like this, since I can use the same configuration for production for running tests (we do this to run tests against prod builds)

Its more overhead currently than I want to take on.