A lot of businesses that operate 24/7 run on containers quite well. When I had to so these sort of quick hot fix things for a startup, almost all of the issues were caused by lack of testing. Testing lacked because there wasn't an easy way to constantly make sure dev staging and prod are absolutely the same. Same infrastructure, same code, same packages, etc.

That's an easier solve with docker containers. And testing, including UI testing, can be integrated much more easily with ci/CD tools and docker containers that have code which goes by commit hashes and which ensure every package down to the version is controlled across environments.