In my opinion, the majority of people have too much faith in their ability to predict the future.
I was terrible at predicting the real world performance of the Apple Silicon M1. It is, in fact, much better than I expected. On the other hand, Microsoft has thus far only had slightly modified AMD chips in their Surface Laptop, and poor performing ARM-designed Qualcomm chips in their Surface Pro X. Maybe I'll be bad at predicting the future, but I do not expect excellent performance out of Microsoft's Surface chips in the next 365 days. Probably longer.
In the meantime, more Windows computers will be sold than MacOS, and they will have mostly Intel chips, but an increasingly large number of AMD chips.
AMD has survived with less diverse revenue streams and much worse product portfolios. I'm optimistic for how they'll do over the next several years.