in case anyone is confused about this sub-thread:
"""
Application Load Balancers provide native support for HTTP/2 with HTTPS listeners. You can send up to 128 requests in parallel using one HTTP/2 connection. The load balancer converts these to individual HTTP/1.1 requests and distributes them across the healthy targets in the target group using the round robin routing algorithm. Because HTTP/2 uses front-end connections more efficiently, you might notice fewer connections between clients and the load balancer. Note that you can't use the server-push feature of HTTP/2.
"""
( http://docs.aws.amazon.com/elasticloadbalancing/latest/appli... )
