AFAIK nginx does not "do it right", it can get HTTP/2 prioritisation pretty wron...

AFAIK nginx does not "do it right", it can get HTTP/2 prioritisation pretty wrong and when it gets it right it can appear to be more by luck than design

https://blog.cloudflare.com/nginx-structural-enhancements-fo...

h2o is probably the only server that has done HTTP/2 right fora long time, others a finally getting it right