I use docker extensively, personally. Modern web app frameworks, especially those in python and ruby, are super annoying (imo/ime) to operate on a bare metal ho

I use docker extensively, personally. Modern web app frameworks, especially those in python and ruby, are super annoying (imo/ime) to operate on a bare metal host, because how pip/gem install dependencies by default is just a mess that's impossible to isolate. Pre-docker, I had no end of headache where touching any deployed thing broke all the other sites due to dependency garbage. Rbenv/pipenv/etcetc are language-specific, non-trivial band-aids and I don't like wasting brain cycles on them. Docker makes it so easy to deploy and operate programs that I even use it for ecosystems that don't "need" it, like Java. Also makes backups super easy because it's just backing up the docker volumes.