I fully agree with this sentiment and dual boot is an excellent "cheap" way to achieve this.
I think you misunderstood my post, which is in itself interesting.
The MacOS people needs the terminal, multiple screens, multiple windows (more than two), mountable disks, specialist high end software, backward compatibility etc. I see these a specialists features usable for a few. For my list of professions, these features are meaningless as the primary interaction are with other machines, fieldwork or human-human interactions.
Pixel precision mouse/trackpad input to interact with small features and the ridged keyboard/screen/trackpad work environment (ie the clamshell) of Macs are simply not cut out for some of the listed jobs. We hang on to old computer paradigm aimed for specialists preferably sitting at a desk (ie the original PC) and these thoughts are still dominating MR especially in iPad forums.
I disagree with most of this vision of "MacOS people". I am not strictly a MacOS person (since I use Windows for work and MacOS mainly for entertainment), but the point is the same.
First and foremost a lot of those wanting the iPad for more want it as a laptop replacement for on the go, not necessarily as a desktop or only device (unless they already have a work laptop, and at that point it's not a "only device" by definition...). Most don't need terminal or mountable disks, they don't even need more than 2 windows on the same screen. What they need is:
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background apps, that is the ability to move from one app to the other without any ever reloading or stop working in the background (not having the screen split in 5 windows, which make little sense in a small screen), for instance via a taskbar or something else (including gestures)
ISSUE with this: it will expose the fact that iPads have smaller batteries than Macs so they would last much less
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desktop software (but not necessarily specialist high end ones), such as full Office (not the half backed version currently available), full locally/background synced cloud software like Dropbox for instance (not the mobile version) and outside the US desktop versions of apps like Whatsapp (whole businesses are managed on Whatsapp in Europe for instance).
ISSUE with this: there is nothing Apple can do to iPadOS. It's up to those software houses, which should no interest in making those apps for iPad (some of them for competition reasons).
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centralized file management with the ability to assign default apps to file types and open them from the file app.
ISSUE with this: none, but it means changing the philosophy on which IOS was built (apps centric instead of file centric)