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"Multiple windows" isn't a feature. It's skewomorphism, trying to replicate a messy desktop covered in sheets of paper, and easily the worst idea anyone ever had for designing computer GUIs. My favorite thing about iPadOS is that it allows for multiple apps to be on-screen at once, without them randomly obscuring each other.

The ideal UI for managing multiple sections on screen would probably be to take the Blender (the open source modeling application) and apply it to the entire OS. I'm sure there's somebody who already made it on Linux if you want to deal with figuring out how to make it run... but I'd really like to see it on Mac OS or Windows.

Microsoft has kind of lead the way here, with window snapping in Windows 7 (and they silently expanded that a bit in Windows 10) but they haven't bitten the bullet and just killed the ability to arbitrarily allow windows to overlap each other.

Yes exactly, that's already a thing. That's called a Tiling Window Manager. Indeed highly efficient.

You could try chunkwm for Mac, but something like i3 or awesome on Linux would work best for this approach.
 
They just released a $6000 professional Mac using high end Intel Xeon CPUs, and have forked iOS for the iPad as "iPadOS" to show they're going to take the iPad in a different direction.

At this point I doubt ARM Macs are coming, and Apple is just going to reposition the iPad to be a more capable laptop substitue for low-end users, and keep Intel Macs around for developers, power users and pros.

Damn, this didn't age well.
 
Damn, this didn't age well.

I suspect they forked iOS and iPadOS because they see a need to have iPadOS and macOS be closer from a UX standpoint, while both will continue to target API and feature compatibility with iOS to make it easier for developers to support 'all' platforms.

Professionals need to stay productive more than anything, and a platform transition wrecks their workflows. I'm sure Apple has a plan to eventually transition everything (including the Mac Pro) but thats not going to be their initial target. I suspect for a few years after the MacBook Pro transitions, the 16" intel models will still have a really high resale value though - there will be people dependent on bootcamp or a windows vm or some app that didn't port well or broke with macOS 11 changes.
 
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