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> FaaS allows me to completely eliminate web server junk from my brain.

Sure, but that "junk" is key to making things scale. Prototype on whatever you want, but if you have to leave the prototype phase you have to care about/get involved in that layer.

Not all parts of your app need to scale in the way you are talking about, that's the key thing FaaS detractors miss.

Web server junk is just replaced with FaaS junk.

without fine-tuning. How do you handle database connection pooling? yes, lambda can scale as a function, but not as a wrapper around database (yet)

What about Datomic Ions?

I think the answer to this right now is either: - DynamoDB - Aurora In my case I am going to go with Aurora as I am deploying Django applications with Lambda

Dynomodb for nosql managed dB, or Aurora with read replicas and multi - AZ for high availability.