Having one device, or one "on the go device" is the view of those who want MacOS as an option on iPad.
Personally that's not me, I need Windows, so unless it's full MacOS in dual boot with Parallels to run a Windows VM, MacOS alone cannot run what I need to work.
But some of those wanting MacOS on iPad want this, the convinience of having to carry one device, a tablet and a laptop replacement, instead of 2. And there is nothing wrong about that. It won't happen because Apple has no financial incentive to make that happen.
For us in the Windows world, the new Elite devices might finally gives us Apple Silicon-like hardware in a tablet format with a desktop OS (granted somewhat compromised tablet experience, but I am fine with that, I can do almost everything in a browser).