And what would the point be? Massive loss of performance by going through a VM - only to save 30 bucks on licence cost for e.g. Windows? Any game dev wants the most performance they can get their hands on.
If the gatekeeper (apple/ms/whatever) decides to tighten the screws, taking not 30% of your revenue, but, say, 70% revenue - then fsck the performance, it may be quite reasonable to do major changes in art, gameplay and coding practices just to fit to a more lucrative market model.
And, as is well known, simply the existence and theoretical threat of a plan B (in Gabe's case, Linux) ensures a much better negotiation position and a better (more fair?) plan A.
