nginx is a very stable, flexible and powerful server for sure. Hopefully you can
keep with it.

The issue of not having any direct stats/reporting about the upstream status
keeps coming up over and over. I think it is the only significant drawback and
would love to see it addressed. Unfortunately folks tend to post that the
monitoring is not the job of nginx. However I disagree - nginx is the one that
pulls and upstream out of rotation, and at a minimum it should at least have a
way to signal another process. It would be great to see this addressed once and
for all - hopefully one of these days it will get the priority and attention it
deserves IMO.