It's the problem that the whole industry is facing - the current generation of hardware is sufficient that hardware refreshes will continue to decline, and companies that want to keep milking us for money regularly need to find a new way to do it.
> the current generation of hardware is sufficient that hardware refreshes will continue to decline
If anything, Apple is refreshing their hardware much faster now compared to the Intel days. There's literally a new MacBook Pro and MacBook Air every year. And of course there are 3-4 new iPhones every year.
I hate subscriptions as much as the next person but how would you pay for continued development of software? Do you say a person can continue to run version X forever but if they want a new version they pay for it?