There is a HUGE amount of information that iStat now monitors and displays in the app. Server apps can be installed on Mac and Windows machines, while a 3rd party, open source server app called iStatd is available for Linux servers. I was blown away looking at the amount of data and information iStat managed to pull and display when I set up the Server app on my Mac.
I used the original iStat a ton. Can’t wait to try out the new version.