The most obvious limitation is the scale out concurrency model of lambda (serial requests within a container). This is great for simplicity but means you can’t

The most obvious limitation is the scale out concurrency model of lambda (serial requests within a container). This is great for simplicity but means you can’t have a connection pool. Something like dynamo db is a better fit if it works for you, otherwise most people seem to be forced to run a few servers with pgbouncer