I'm sure it can. However in my real world use cases, HTTP/2 and 3 work better when available for me, so I'm glad to have them. I'm sure this comes as no surprise to most people since SPDY went through a lot of testing before becoming HTTP/2, but just because it doesn't win on every point of the graph does not mean it doesn't still win overall.

Besides that, more than half my point is that I like HTTP/2 and HTTP/3 for the featureset, and you can't get that by increasing the max connection limit for HTTP/1.1.