That’s fine for paste, but copy is the real problem. Also, shift and insert are very very far apart from each other and are not one-handable if you’re holding the mouse with the other hand.
Copy is Ctrl+Ins, cut is Shift+Del. Looking at my ANSI keyboard, all are achievable with one hand. Though, when these were designed, GUI’s on IBM based machines weren’t really a thing and two-handed keyboard shortcuts were common-place.
With a right handed mouse it’s hard to do Ctrl+Ins with my left hand. But it’s possible, I’ll admit. It’s just pretty suboptimal given how ergonomic Cmd+C is on a Mac keyboard (thumb on Cmd is way easier to reach for than pinky on ctrl, and reaching for ctrl+Ins is harder than either.)
Yeah, mice weren’t really a thing on the early IBM AT’s and clones when CUA was being developed. Mice were around and the GUI was very rudimentary (Windows 2.0), certainly when compared to System 4 and 5. In an ideal world, the Meta key, like those found on Sun keyboard, would have been brought over to AT keyboards to cover this.
