This is a really well-written article that gets deep into the tech, thanks. The Exodus tool looks like it will be very helpful for our own binary-bundling for Lambda.

We're using ElasticTranscoder extensively for audio and video on https://images.nasa.gov/ and would love to use FFmpeg on Lambda, but the sizes of our files -- especially video -- are likely to be too large to fit in Lambda's /tmp/ storage. Unfortunately, there's no way to do an NFS mount to something like EFS, nor an S3Fuse to mount S3 objects; curses, foiled again! We've been thinking of having a Lambda launch a Docker to do this work for large files, and your Exodus bundling will come in handy there.