Yes, still love my Nexus 7.
No, there's no further support (either OS updates or security updates) from Google. You'd have to go to a 3rd party firmware if you wanted to get Android 7 on this baby.
Too bad Google didn't come out with a replacement Nexus or Pixel device (despite what Evan Blass said to the contrary). And unfortunately nVidia seems to have dropped their updated Shield X1.