During the first quarter of 2016 Esri® released its latest version, 10.4, and a few weeks later Lucity released version 2016. As you are likely aware, Lucity releases two versions a year: one around February the other around August. Esri has also been releasing a couple versions a year.
Just as with the Lucity software, we have some clients that are ready to upgrade their ArcGIS software the first day it is available, and we have other clients that hold off on upgrading until it is an absolute must. Needless to say, it can be a bit overwhelming to keep track of which versions of Lucity are compatible with which versions of ArcGIS. That was until (drum roll please):