I understand what you're saying, but you changed the parameters of my example. I said if the device does what you want it to do for the time period you want it done.
In other words; if you care about a device lasting no more than two years, then if it lasts four years that's irrelevant. If you want as long a lasting device as possible then 'yes' it's an issue to take into account. But for all those people that switch every two years it might not be an issue.
For me though, irrelevant of time, I won’t stick with a company that shows no promise in a particular market. It takes time and effort to change operating systems. I want to do it on my own terms.
I understand the other perspective though.