The real question is, how long does it actually have to hang around really? With the way this market is going, it probably only has to be supported in earnest for a few years by which point it'll be so far obsolete that everyone who matters will have moved on.
We're talking about the architecture, not the hardware model. What people want is to have a new, faster version in a few years that will run the same code written for this one.
Also, hardware has a lifecycle. At some point the old hardware isn't worth running in a large scale operation because it consumes more in electricity to run 24/7 than it would cost to replace with newer hardware. But then it falls into the hands of people who aren't going to run it 24/7, like hobbyists and students, which as a manufacturer you still want to support because that's how you get people to invest their time in your stuff instead of a competitor's.
