Re: Stopping updates
To add to your comment, I consider myself to be an early adopter, allowing the update to push through as soon as it's available, knowing well that it might hamper performance and/or render some apps non-usuable.
I own both Apple and Google Products (own a Nexus 7 as well). Very recently I restored my Nexus 7 to factory settings since it was getting very sluggish...performance has been restored althought some apps still crash.. but it's expected.
Given how the industry is evolving, I've come to accept that this is the nature of the beast, that companies will seek to push updates and are aware that older devices can be negatively impacted. I have a Gaming PC that ran Windows 7 and didn't have one single issue...after upgrading to Windows 10 (which I do really like), I am encounter issues that never occured before, and I can't say that I don't loose my patience every now and then since I would really like for the PC to simple work and not give me a headache.