> Lambdas are supported, what do you mean?

Lambdas are not functions. You can't have statements in them, only expressions. So no, they don't cut it as anonymous functions.

>> Webpack does a great job of handling assets by simply importing/require them in the code. Python import system, can't support that kind of importing.

>What does this even mean?

It means that in JS you can do "require('./image.png')" and webpack will automatically handle the image for you. Python doesn't have any way to import anything that is not .py file.