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"Not just for my own projects but for $500 million dollar companies and more."

Seems reasonable to assume these are serious production environments, no?!

Not necessarily. When you get to those numbers you're seeing dozens of teams with their own silos and deployment methods. So they might be responsible for the core business that's running 30 nodes and serving 100MM users a day, or they might be working on some internal portal or a WordPress site.

When I mentioned that, it was for a company that got acquired by a bigger company. I can't give specifics with revenue / profits but it is a 10+ year old online SAAS business and all of their web apps are being served by Docker Compose with a non-trivial amount of direct customer facing traffic.

Lots of data, caching, web apps, background workers and lots of various API integrations. No fancy React front-end, no fancy crazy system architectures. Just a typical LAMP stack but running in Docker Compose, cranking away serving value to customers with very good uptime and a very low cloud cost relative to revenue. With that said, a managed database was involved but all of the web traffic was served by apps running through Docker Compose with a simple git push model of deployment that handled thousands of deployments over the years without much fuss.

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