I don't understand how basically everything has languished under Nadella. Apple doesn't sell MacOS, so it should be less incentivized to keep improving it, but it is way better than Windows and the gap keeps widening. If I didn't use MacOS, I would just use Linux.

Windows does always cater to backwards companility and making IT departments happy, so that explains some of the lagging technology and systems. I can't believe NTFS is still the default file systems. That's generations behind Apple's APFS.

The stock has popped, and that's what Wall Street cares about, but I could see a world where this chronic underinvestment and mismanagement basically implodes the entire company in the coming years.