I believe what we are seeing is a faster technology company life cycle than what we saw with Microsoft.
Microsoft peaked with it's desktop/laptop OS monopoly and then crumbled when the consumer technology paradigm shifted to mobile/tablet.
Like wise Google has enjoyed more than a decade of search monopoly.
(Effectively, you are free to choose other search engines, but internet consumers don't. They are brand locked-in)
My perspective is as a website owner who has become fed up with the page ranking shenanigans of each of Google's search engine updates.
It's fairly obvious to me that Google purposely ranks lower websites who they feel should be paying them to get the audience they once enjoyed organically.
As an ordinary Google search user I see poorer quality search results than I did previously.
It's smacks of desperation.
Luckily I realised the vulnerability of my online business to being dependant on Google for clients more than a year ago.
Also, using analytics, I spotted that the desktop visitors were declining 10% annually in favour of mobile visitors.
So at the beginning of this year I decide to create mobile App versions of my website business.
Choosing to do iOS only Apps was the right decision.
If you are going to dip your toe in then you want to do it in the most lucrative market.
At almost 3x the revenue of Android in addition to lower support and development costs (Android is fragmented over vendors/platforms/OS versions/stores) iOS makes more sense in every way.
I hear the cries for "When are you doing an Android version?", from my website users to which I give the honest reply "When it makes financial sense".
I doubt if I'm alone in this and it makes me wonder how Google can turn around their longer term prospects and make Android as much of a success as iOS.
It may already be too late.