This is essentially what MS did with .NET and assemblies: they made it pretty difficult to install assemblies in the global assembly cache (GAC), and encouraged

This is essentially what MS did with .NET and assemblies: they made it pretty difficult to install assemblies in the global assembly cache (GAC), and encouraged application developers to simply distribute/load application-specific assemblies in application-specific directories (\Program Files tree). This was all done with the prior experience gained from the system-wide DLL versioning issues that were finally resolved in (I believe) XP/2003.