It's not the async logic that's hard, it's the parsing and handling of the HTTP protocol. Apache had years to get it right and figure out the workarounds for no

It's not the async logic that's hard, it's the parsing and handling of the HTTP protocol. Apache had years to get it right and figure out the workarounds for non-compliant black boxes. It's this that keeps it around unfortunately. Its architecture is obsolete and a waste of resources. Nginx does the async stuff properly I believe but there's still the nonsense of forking child processes.