Sure, it was way easier to move at Google in the early 2000s than it is now. Yet, one has to admit they still keep trying. The list of products that they tried and killed doesn't show signs of stagnation:
https://killedbygoogle.com/And that's only the things that they have released. I'd bet that there are lots more that never make it to the public.
And I expect no less from Microsoft, by the way. Microsoft is, in fact, a great case in point of how failed releases don't hurt the company's PR long-term. How many failures have they scored trying to catch up with the missed opportunities of the 2000s? Smartphones & tablets, search, music players, social media.
They were late to move the Office to the cloud, and kept pumping dollars into the Explorer/Edge lost cause, too.
I don't know enough details, but Xbox seems more like an outlier than a norm.
Yet they rebounded with Azure and made some good bets with AI, and are doing better than ever. However, we don't see a stream of new product bets coming from them.
Oh, and on Apple: I wouldn't discount the role of cult-like following in repeated product success. Neither of the other big techs has such a relationship with its user base. You don't see many raving fans of Facebook or Google. And you definitely have millions of people who would buy any new Apple product simply because it is a new Apple product.
It's like Joel Spolsky but on a global scale. In the 2000s, whatever Joel Spolsky touched turned into gold. Stack Overflow? Check. Trello? Check. Was there something unique about these products? Details, sure. But the biggest thing was Joel's leverage.
Having run a highly popular blog for developers, he could instantly reach out to his early adopters. Given that many of the readers were actual fans, they'd jump on the opportunity, whatever it was. So the early traction was not a problem (which was especially crucial for the developers' forum).
Scale that up to the big tech context, and you get Steve Jobs.
A side note: I wonder how long it will take Tim Cook to dismantle that. You can already see cracks.