Phoenix as a Serverless replacement?

This ElixirConf talk blew my mind. Wanted to learn more and see if anyone else have had experiences like this? How does fly.io free tier scaling compare to azure / aws free tier? How many requests a month could it roughly handle assuming 1kb in and 1kb out, 2 seconds for each req?

Personally I’m a big serverless fan. I use Azure functions extensively at work for event driven webhook handling. Cold starts are not a big deal for our usecase but I understand its limitations for flows involving waiting users.

For Phoenix to hit feature parody imo it would need a mix generator for quick endpoint setup. The mix task would also need options for token auth via url query or body params. Bad or missing tokens return 403.

Example:
$ mix phx.gen.serverless -name your_serverless_func -auth url_query
would generate https://localhost/your_serverless_func?token=123 endpoint plus all the router / controller setup etc. All thats left to do is handle the plug from the controller and return response.