The article content doesn't really do the subject justice. The constant churn of the OS has caused a variety of legacy software problems where now I run older v

The article content doesn't really do the subject justice. The constant churn of the OS has caused a variety of legacy software problems where now I run older versions of OS X in a VM in order to support software that can't run in new versions. Some of that software I simply don't want to pay for no new features (accounting software), and other software isn't going to be updated. This is software that worked with recent previous releases within the past couple of years. Meanwhile the same software of the same versions still run OK on Windows 7 (and 8 and 10), so Apple's backward compatibility support, API/ABI stability, isn't as good as on Windows.