Comment by BrenBarn

I agree it's a mindset, I just mean that that mindset has kind of coevolved with a bunch of other stuff.

Even Microsoft seems to be slipping. It seems like these days the (unstoppable!) Windows updates may actually change functionality and UI, which was much less common in the past. And of course the new versions of Windows are more aggressive about updating. They still maintain backwards compatibility for running third-party programs, but I feel like their mindset used to include more stability in their own software as well.