I've had good success with Ubiquity edgerouters
Not saying it wasn’t worth it - it’s a huge step up in reliability from what I had, but I kinda feel like an EdgeRouter is a gateway into the wider Ubiquiti ecosystem.
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.