"I strongly feel if someone could match the merging ability of Git with the ease of simple, well worded commands, it could win."
But we have that, and not only didn't it win, it shows no sign of winning. Mercurial isn't even growing in apparent mindshare.
"Easier" and "technically sound" is by observation, not by a long line of strained theorizing, not enough. Theories must take this fact into account or be useless in explaining the real world.
I strongly feel if someone could match the merging ability of Git with the ease of simple, well worded commands, it could win. And it doesn't even have to be a Git replacement, but a better frontend. Kind of how yay is to pacman. Or how most use something like Handbrake instead of ffmpeg.
In a lot of ways, it reminds me of Python and Perl. Perl was definitely more powerful as a language, but Python felt like natural writing in pseudocode. Enthusiasts rightly point to the power of inbuilt regex, but like Git, few actually could harness it well enough to make that unreadability worth it.