This allows us to benefit from helpful things it does for us, like enabling jemalloc: https://github.com/matrix-org/synapse/pull/8553 We weren't going through `start.py` before, because it was causing some conflict with our `docker run --user=...` stuff, but it doesn't seem to be a problem anymore. Having done this, we won't need to do things like https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/941 anymore.
Slavi Pantaleev