Unrelated: It's amazing how many predictions he got right. It took Microsoft another 15 years to fully realize that you cannot "bet the farm" on your OS.
Perhaps their strategy has shifted at the precise time that it will no longer be so profitable.
Well, almost 20 years later. It seems like Apple'sstrategy was right. By owning the hardware and software and having the culture to do both, they were able to come out with the iMac that made them profitable, the iPod that made them relevant, and the iPhone that made them rich.
Owning their own OS allowed them to take one OS and port it to phones, tablets, watches, set top boxes, and speakers.
Plenty of companies have tried owning the hardware and software stack on their products, and not ended up being successful.
The phrase 'owning the hardware and software stack' also disguises the fact that they took an existing software stack that had a kind of free licence that allowed them to remove the freedoms of their customers / users.
The suggestion that Apple has a single OS that they've ported to phones, tablets, watches, set top boxes and speakers is a bit disingenuous. Microsoft tried pushing the 'one OS everywhere' propaganda more than a decade ago (too), but it simply didn't / couldn't happen (either).
Ultimately it isn't a compelling sell to end users -- what users are most interested in is a consistent, quality interface, which may include consistent availability of quality applications, depending on platform.
already worth the read
As a former BeOS user, this still stings me a bit.