nginx.com is a corporation led by product managers selling what they believe customers want and will pay for

OpenResty (Lua) has/had the weight and momentum of Taobao and then CF behind it.

ngx_mruby, nginxpy, ngx-php, and ngx_http_perl_module also exist. And so do freenginx, caddy, istio/envoy, etc. It's a toolbox.