That leaves the Pixel C as the only Android tablet Google itself is selling directly. Despite some flaws, that's probably still your best bet for a large-screen Android experience right now -- and Android N should fix many of the issues we had with the tablet. And, of course, Samsung still sells a dizzying array of Android tablets, from large to, well, larger.
Given the Nexus 9's lifespan, it's not at all surprising that HTC has stopped manufacturing the device. HTC did confirm that it'll continue selling and supporting the device for the near future, but if you for some reason had your eye on it and never pulled the trigger, don't wait too long.