I'm pretty sure I already know the answer to this, but for the record ...
My understanding is that Microsoft allows different versions of Visual Studio (for example VS 2013 and VS 2019) to coexist "side-by-side" on the same development PC. And even different versions of .Net to coexist on the same server.
1) Does Micro Focus allow different versions of Visual COBOL to coexist on the same development PC?
2) And different versions of COBOL Server to coexist on the same hardware server or same virtual server?