This is a really neat solution. I like it. One solution I've been working with is to create an index at build time for static sites and push to SaaS ElasticSea

This is a really neat solution. I like it. One solution I've been working with is to create an index at build time for static sites and push to SaaS ElasticSearch and use AWS Lambda to make a query interface to it. It works well, albeit not free to run. This solution beats it in cost and probably perceived performance too.