When you save a VI in LabVIEW 2018, it cannot be opened in LabVIEW 2017. This forces a "whole team" upgrade strategy. You cannot have one engineer running 2018 and another running 2016 sharing the same codebase effectively.
LabVIEW 2018: A Cornerstone of Modern Graphical Programming and Data Acquisition labview 2018
Among the myriad of releases, stands out as a pivotal iteration. Released at a time when the software industry was pivoting sharply toward interoperability, Python integration, and the Industrial Internet of Things (IIoT), LabVIEW 2018 represented a bridge between the traditional "G" programming paradigm and the modern, polyglot world of engineering. When you save a VI in LabVIEW 2018,