These don't seem like the most sound criticisms honestly.
It's still a command-line editor. Just like vi.
Not sure what the issue is there?
It cannot take advantage of the modern computing environment
gvim/macvim exists. They also give you regular clipboard support. Though I honestly don't get much out of all that, and am happy enough with vim in a terminal, but I understand the motivation.
To perform multiple operations ... requires you to switch modes
Vim is modal, yes, but what is the specific disadvantage of that? That it has a learning curve? Mode switches are generally single key presses, so it's not exactly onerous once you know what keys to press. Equivalents in "modern" text editors require use of the mouse, which while being much easier to figure out, is also much less efficient. Using the mouse, though just taking a bit longer each time, is enough for my brain do a switch and focus on that action instead of the code - unlike the vim mode switches I do all the time without thinking.
No, actually, in the vi days, to save paper one had to enter more keystrokes, not fewer
That sounds plausible, but not all that relevant to how one uses vim now.
former users of vi were astonished by how few keystrokes were required to accomplish things
Also irrelevant. Vim's text objects, which basically offers you a vocabulary for text manipulation, has no match and will generally allow vim to win in practically any keystroke comparison. It's not clear how well you know how to use vim, if it all, though you've clearly used and hated vi in a past life :).