I'm aware of what docker is, I've been using it myself since it's inception and the tech I listed even before that. I'd recommend not assuming everything you have seen applies everywhere, to everyone else.

"Just 30% of developers say they use containers in any part of their workflow." https://www.docker.com/blog/2025-docker-state-of-app-dev/

So, yea. Large companies, yes, for sure. But that's not 100% - is it.