> In a standard setup

What is a standard setup in 2019, there is none? There is also no standard in using nginx as front facing entity.

In my prior comment I was friendly and gave an example why some might not have nginx in their stack and BTW the discussion is about Rails lacking http2 and you try to convince me that this is expected and right.

This is pure ignorance paired with incompetence, maybe in your small world things work this way. Let's just stop here and go back to your legacy stack.