I'm in your position right now. I set up Nagios to monitor about 50 servers last year and now I'm almost done switching to Icinga2. I think it's worth it if yo

I'm in your position right now. I set up Nagios to monitor about 50 servers last year and now I'm almost done switching to Icinga2. I think it's worth it if you have spare time, but the major improvements I've actually noticed have been UX, clustering, and graphite plugins. other than that it's Nagios with a nice GUI. Not worth the switch if you have pressing issues at the moment.