Python’s Cambrian explosion of dependency management continues. Maybe one day via some strange machine form of genetic algorithms a canonical system will emerge.

I was expecting this to be containers under the hood, instead it seems the idea is basically to bundle your virtualenv and ship it to prod? I think I'll stick with Docker...

And with just 3 layers: Runtime, Framework, Application. But at least you are not switching tools, and it presumably would prevent you from installing LARGE_v1.1, and then installing TINY_v2.2 in a later layer, which however upgrades LARGE to v1.2 and your docker images are now twice the size.