The problem is if they cede the home/consumer market, the average non-IT staff member will become familiar with something else from their personal use. Now as an IT manager or CIO, you can decide to either gravitate toward what's more mainstream (assuming software vendors fill in the necessities, which is typical), or increase training spending to keep end users on the legacy platform nobody uses at home anymore.
You can't make that kind of organizational switch overnight, but eventually the IT staff will also migrate toward the new popular platform, and then staff expenses will go up (I'm often tempted to learn Cobol to soak up maintenance programming contracts).
It's just not feasible to turn your back on mainstream consumers and expect to maintain growth in enterprise when talking about these kind of horizontal markets.
