What are your main use cases, is it mostly about bundling up lambdas?

Yes, basically bundling js-files, package.json, etc into a zip file

Following up on this - we could soon have v2 support for python lambdas, along with all the other python support we're porting to v2. At that point it wouldn't be hard to add support for JS lambdas, if you're interested in doing so.

Nice! That definitely puts Pants on top of the list.