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Part of the problem with the Mac is that Intel has been slow to make progress. Particularly when it comes to faster low-power chips, Moore's Law has been failing us for some time now. How long till Apple start putting their A-series chips in Macs?
The new iPad Pro already benchmarks as high as some of their recent laptops (Yes, I know the thermals are different, etc but bear with me here) My bet is that over the years iPad Pro will expand to do more and more of the jobs that people traditionally use MacBooks (or laptops in general) to do. We'll eventually see a world where most people have iPads, not laptops - thereby relying on A-series chips, not Intel, to g…
I think people have used iOS long enough to see that it's pretty limited as far as file management goes. The great multitasking of the iPad is still limited to split screening just two apps, a big step down in productivity from even classic MacOS of the 90s.