Or, much more likely, they'll continue building new hardware as they do now, and let the length of software support for old hardware in one particular market be

Or, much more likely, they'll continue building new hardware as they do now, and let the length of software support for old hardware in one particular market be a software problem for the vendors selling into that market. Don't assume that attempting to solve a problem with a law can only have one possible outcome, and can't possibly have a different outcome instead.