Cypress to Playwright: ~67% flakiness drop

I dug up engineering blogs from teams that actually completed the migration. Not just started, finished.

The flakiness drop is real. Currents.dev analyzed ~400M test records and found Playwright's flake rate around 0.72% vs Cypress at 0.83%. Doesn't sound like much on paper, but at scale that difference is enormous. Multiple teams report roughly 67% reduction in flaky failures.

The thing nobody warns you about though: Cypress's auto-waiting and retry logic actually masks race conditions in your app. When you move to Playwright, all those hidden timing bugs surface at once. Your first week looks like absolutely everything broke. Multiple teams reported near-panics before realizing Playwright was exposing existing problems, not creating new ones lol

Every team underestimated the timeline. A 2000-test suite takes 3-6 months in practice regardless of what the estimate said. Teams that succeeded ran both frameworks in parallel and migrated critical paths first. The ones that tried a big-bang rewrite burned out.

How long did yours actually take vs initial estimate? Did the flakiness improvement hold as the suite grew?