I started to have a look but that first diagram arrows everywhere, does no one do simple any more?

It does look like what a normal web app would do in say PHP or Django. Is there really an advantage to splitting it into microservices and putting it in AWS Lambda over a load balancer and extra instances when needed? A normal app would have those services split into classes / modules and would run on the same machine (the aysnc tasks being an exception). I imagine my approach would need a lot less ops and coordination between the parts.