I laugh when I read this because the DataHand was so much better but inefficiently manufactured and badly-priced. Five motions per finger well, macros, and mouse control 20-something years ago.
The Azeron gaming keypad [1] has a similar design but it's mainly intended for gaming so you'd have to get two of them and do some remapping to use it as a proper keyboard.
I think the lalboard [2] and the other DIY efforts in this thread [3] are probably the closest thing to a modern DataHand right now.
Here's someone typing at 120 WPM on a lalboard [4]. It looks so effortless when compared to QWERTY [5].
I do wish we'd start to see some more mass produced DataHand-like designs. I've never used one myself but it does seem like it'd be comfortable to use.
[2] https://geekhack.org/index.php?topic=41422.800
[3] https://github.com/JesusFreke/lalboard