Re: Nexus 7 tablet
"The last update turned my nexus from something still worthwhile to have lying around to utterly unusable a year or so ago. I wouldnt be at all surprised if google did it too."
Luckily, Nexus devices have a plethora of custom ROMS that can be flashed to them to remedy this:
https://forum.xda-developers.com/nexus-7