stio/istio/wiki/Enabling-Envoy-Authorization-Service-and-gRPC-Access-Log-Service-With-Mixer>enable Envoy ext-authz and gRPC access log API support in Mixer</a>, which allows you to upgrade Istio to post 1.7 versions while still using 1.7 Mixer with out-of-process adapters. This will give you more time to migrate to Wasm-based extensions. Note this temporary solution is not battle-tested and will unlikely get patch fixes, since it is only available on the Istio 1.7 branch which is out of support window after