Unless the price of the upgrades cover the support. Yes, of course, it would be a gamble, because nobody can predict what the demand would be in 3-4-5 years. But I wonder whether they could reduce the cost with smart software engineering (i.e whether they could compel themselves to do smarter software engineering by promising paid upgrades) or whether they could make a promise to make paid upgrades OR open sourcing the code for the components that will be different from the newer versions. (I.e. mainly the hardware drivers.) Yes, I know licensing issues may indeed pose problems for third party components.