The 1.10 release branch was cut earlier today
From this point forward, only changes cherry-picked onto release-1.10 will be included in the release, and barring some last-minute exceptions (please reach out to #release-1_10 for these), no new features will be merged.
For more information check out https://github.com/istio/istio/wiki/Istio-Release-1.10.
Thanks and happy Istio-ing,
Sam, on behalf of the 1.10 Release Managers