For developers, moving from 2015 to 2019 is not merely a version upgrade; it is a transition from a "Windows-only" compiler to a world-class, standard-compliant toolchain capable of building for any platform.
All these versions share the major toolset number 14 (v140 for 2015, v141 for 2017, and v142 for 2019). visual c++ 2015 to 2019