[cryptonym]

- Push a version with the new logic but not yet enabled, still using legacy logic, able to implement both

- Push a version that enables new logic for 1% of traffic

- Continue rollout until 100%

[nrhrjrjrjtntbt]

Can also do canary rollout before that. Canary means rollout to endpoints only used by CF to test. Monitor metrics and automated test results.

[cryptonym]

That's ok but doesn't solve issues you notice only on actual prod traffic. While it can be a nice addition to catch issues earlier with minimal user impact, best practice on large scale systems still requires a staged/progressive prod rollout.