I was talking about installing Apache and setting it up as a reverse proxy vs. installing Nginx and setting it up as a reverse proxy. Nginx takes less configuration in that scenario. I've done both and neither are hard, but nginx is slightly easier.
Installing Apache is a single command, enabling mod proxy is a single command and two lines of config. So yes, they are both trivially simple to do, even if Nginx is slightly simpler. Neither should be seen as a barrier of complexity.
ProxyPass /foo http://foo.example.com/bar ProxyPassReverse /foo http://foo.example.com/bar
I've used it for years, it's not hard.