&gt; Yearly sales cycles create a toxic incentive to focus engineering time on flashy demo-friendly features<p>I understand that argument, but what incentive does DRM with a killswitch create for the software company, if its customers must pay in order to keep the product running at all? Might it not create different perverse incentives, for example trying to close the ecosystem in order to make a switch a painful experience?<p>Or in other words: What incentive to improve the software (other than the threat from competitors) does subscription DRM provide, if you can just collect the rent, because the cost of switching is too high anyway and the customers are at your mercy?