Don't worry, Windows is still far, far more ubiquitous. The bigger reason people don't play solitaire as much as they used to is that it is no longer the only game installed on their PC.

So many people in the 90s learned solitaire playing it on a work from a lack of other options on their work PC. Now with the so many games on the web and your smartphone, you might not even try it.

People give Microsoft a lot of shit, but including bundled games on what was at the time primarily a business OS was bold, controversial, and brilliant.