[SideburnsOfDoom]

And language lock-in. So far Lambda supports only Node.js and Java.

[brianwawok]

Java gets you ruby via JRuby and Python via Jython... (Not sure how current they are these days). So missing C and Rust type stuff I guess?

[alexbilbie]

The AWS Lambda team wrote a blog post about how to use Python - https://aws.amazon.com/blogs/compute/using-python-in-an-aws-...

You can also call native binaries so you therefore you can use languages like Go or C or anything else that statically compiles.