Wow, you actually vouched for Kitkat, something Google wasn't able to fix in 18 months and was very buggy initially (much more than IOS!), over IOS 8 you had for 7 days... Kitkat is on 40% of phones 18 months after release, a majority of them probably shipped within the time period. Same thing is happening with Lollipop. Uptake is abysmal 1.6% after 3 months (even new phones are barely getting it in this case). That's says it all.
The one update that was "borked" was 8.0.1, and that was for 1 day (20K were hit by that issue, not everyone) 8.0.2 got out the next day. Every other update has been smooth. As for needing a techy to upgrade the Iphone? Are you serious, my father's pushing 90 and he does it.
The several 8.X updates are mainly for added features (with a few bug fixes mixed in). In all, there have been 4 independent bug fix updates + one major feature update (healthkit/applepay). That's in almost 5 months. It is probable that most remaining bug fixes will be bundled with the 3 feature upgrades releases.
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You do realize that Google fixes the bugs/security issues as bigger point releases (for the OS) because they have to go through OEM's and carriers. That's why it had tried switching out part of the service layer to the play store. To be more like Apple.