Let me start by saying that Aruba doesn't pre-announce target end-of-sale dates, and does not make any public commitments on that beyond the 6 months' notice which is part of our hardware lifecycle policy (as well as the commitment to support these platforms for at least 5 years after the end-of-sale milestone).
Since Aruba started shipping APs, the typical Aruba AP has a minimum "active life" (time between launch and end-of-sale) of at least 4 years. Sometimes longer (6 years or more), and very rarely shorter (one or two instances of 3 years). The 5 years of support are added on top of that.