I've compared a few thousand tests in each testing library from real companies and I've found Cypress to be with "as many defects as Selenium in real projects".

Most of the other open source tools (not to mention enterprise tools like Testim.io where I work) support the things that make Cypress "fast" like mocking network requests or automatically waiting for elements. I wrote an article about this somewhere I can dig it if you want.

If you have data showing differently I'd love to see it.