On the flip side, the UAP-AC-PRO access point that I bought 5+ years ago is still supported and receiving updates to this day. And that's the case for the majority of their access points.
Glancing at their documentation, it seems that they've only EOLed the three early 802.11ac access points they released. Of course that doesn't help you or make your concern any less valid, but it's not like they're in the business of just willy-nilly cutting off support for their products. The one you bought just happened to fall into an unfortunate minority.
