Apple's idea of a "stable ecosystem" begins and ends with them building a few different lines of glorified appliances and then walling them off from the rest of the world. It would be pretty embarrassing if Apple didn't have stability in that kind of environment. For those who enjoy the sterile curated environment Apple tells you to enjoy, have at it.
Google, on the other hand, is aggressively pushing a viable contender to Amazon in the AI, home assistant, and data analytics spaces, and Microsoft in the education and corporate office suite space. Google maps not only feeds the most commonly used consumer GPS navigation system in the world, its API is also one of the largest sources of route-planning data used by delivery and mobile technical service personnel in the corporate world today. Google's software and services are used by pretty much everyone, including Apple users, everywhere. The same can't be said about Apple's software. Not even close.
And most, if not all, of Google's software works just as well on my Samsung phone as it does on my Dell laptop, my neighbor's Mac, my Daughter's iPhone, and even my Hisense TV. And you can sing all you want about "fragmentation", but the truth is that it is just about as much a guarantee that any given Android app on the Google App store will work on any old Android phone, just as an iOS app on Apple's store will work on any old iPhone.
But sure. Google killed that nerdy "glass" thing and its weird social media.. thing.. a decade or so ago. So they are the "kill everything" company ("everything" in this context being all sorts of technologies Apple hasn't even begun to try to explore yet).