Provisioned concurrency is insanely expensive. If you have any kind of a thundering herd access pattern then Lambda is a complete non-starter because of the warm-up and scaling characteristics. We eventually just put an nginx/openresty server on a regular medium EC2 instance and got rid of Lambda from our stack completely and now we're paying about 1/300th the cost we were previously and the performance is infinitely better.
I'm sure it has some use-cases in some kind of backoffice task queue scenario, but Lambda is nearly unusable in a web context unless you have a very trivial amount of traffic.
I'm sure it has some use-cases in some kind of backoffice task queue scenario, but Lambda is nearly unusable in a web context unless you have a very trivial amount of traffic.