So from now on Visual Studio 2017 will be mandatory from 4.20 release onwards and Visual Studio 2015 can’t be used anymore? I still see a lot of serious bugs and stability issues on all major forums and not only the Microsoft ones about VS2017 and that worries me then because any VS bug/issue would add to any bug in UE4 itself and it could become a real nightmare. Not that VS2015 is perfect but it still is far more reliable.