Comment by ameliaquining

These sound to me like they are mostly problems with protocol maturity rather than with its fundamental design. If hypothetically the whole world decided to move to HTTP/2, there'd be bumps in the road, but eventually at steady state there'd be a number of battle-tested implementations available with the defect rates you'd expect of mature widely used open-source protocol implementations. And programming language standard libraries, etc., would include bindings to them.