I'd say the primary benefit of ansible is it makes you document everything. It's easy to simply set and forget with tools like docker compose, but then when you need to change something again, you have to recall what you did originally and fix that.
ansible just feels a bit slow & cumbersome for simpler setups, so i'm using envsubst for basic templating to see how it feels. It's perhaps telling that something like Rocket.Chat just has `docker-compose up` too: https://docs.rocket.chat/v1/docs/deploy-with-docker-docker-c... and it's annoying that Matrix doesn't have something that simple (especially given Matrix 2.0 has more moving parts serverside: auth + voip server).