AutoCAD 2016 uses the .dwg 2013 file format. It can open older files, but to open files created in AutoCAD 2018 or newer, you will need to convert them using the "DWG TrueView" utility.
Instead, utilize Autodesk’s current subscription model (which includes older version access in many cases), use free DWG viewers and converters, or transition to a modern CAD platform. If you absolutely need the 2016 binary for a legacy project, contact Autodesk directly with proof of prior ownership. AutoCAD 2016 English Win 64bit Dlm.sfx.15
AutoCAD 2016 introduced several "quality of life" improvements that fundamentally changed the user experience. 1. Enhanced Visual Experience AutoCAD 2016 uses the