We are running oC on Nginx 1.11 with PHP7.0-FPM, Wildcard SSL, on Postgresql just fine. I will give that it took a lot of tuning to get everything right and with the new changes in oC for .htaccess and .user.ini in 9.0.2, I ran into even more issues based on permissions.
Upgrades to PHP7.0 brought in errors that needed configuration changes and then the Nginx upgrade to HTTP2 from SPDY brought us down for half a day. So for a normal user it can be difficult. Having a Package with Nginx that just works out of the box would be nice. Especially with the upcoming release of Nginx that with support dynamic loading of modules, something brought from the Tengine fork of Nginx.
The setup and use of the front_controller active code is not easy for the new user. There is an excellent updated NGINX config in the forum, but it is not posted to the OC documentation.
I am going to try it this weekend and see if the changes are implemented for "pretty URLs".
He is right that an own cloud-nginx would be nice to have on Ubuntu.