[xorcist]

Agreed on the rollback part.

It is easy to pick the silliness of the kernel reason, but Docker is moving fast right now. They are still getting the basic building blocks in place, and the Docker in two years will look nothing like today's.

We use Docker quite a bit today, but it's immature and it shows. With Composer I feel the basic functionality is finally in place it needs time to mature.

So I think it's quite wise to wait. You don't need to chase every new technology. If you have a product to ship, focus on that instead and use whatever tools are proven to work.