To hint at malice "...it felt like their interface and even their presentation of the product was a direct rip-off of our efforts" and then say "I don't want to attribute any direct malice" seems disingenuous. I feel like those fist two paragraphs could just be cut.
Many people have found the Lambda + API Gateway combo useful, but cumbersome which is why so many different projects have sprouted up to fill that gap e.g. https://github.com/serverless/serverless and https://github.com/claudiajs/claudia
Even AWS themselves have multiple preview projects in the same vein. There is another one just for Node.js that is designed to work with existing apps that were built for the Express framework https://github.com/awslabs/aws-serverless-express, so less lock-in there I guess?
It fine to promote the benefits of Zappa vs Chalice, including the fact that it avoids lock-in, but honestly the way the author approaches the comparison leaves a bit of a bad taste in my mouth.