[trowawee]

Your first point alone would make Docker worth it for me if that was literally all it did. I've on-boarded junior devs on several projects over the last few years, and being able to give them pull access, send them the instructions for installing Docker and docker-compose and then having a working dev environment on their local device an hour after they open their computer for the first time is invaluable. The whole universe of tools that have grown up around Docker are also fantastic, but erasing the friction of starting up is a killer application on its own (also, making it so I never again have to hear "Well it works on my machine!" is also, on its own, worth pretty much any pain Docker brings).

And what I've seen is that at some point, at least a few of the junior devs get interested in what's going on under the hood and ta-da, we have our candidates for dev-ops work. Erasing the initial friction doesn't mean they erase their curiosity.