I still have inverted-T arrows on my keyboard, but, I'm curious if you think it's more the new reality vs muscle memory mismatch, or a fundamental design flaw?

I still have inverted-T arrows on my keyboard, but, I'm curious if you think it's more the new reality vs muscle memory mismatch, or a fundamental design flaw? Would children growing up only with flush full size r/l & half size u/d arrow keys find them vexing? Would they prefer inverted-T? The types of keyboards I've cycled through in my life between various VAX, DEC, C64, Apple 2e, PC, ergonomic keyboards, laptops, I seem to adapt without really noticing. I look forward to seeing if I am flummoxed by the new arrow key layout, as much as I am by the constantly shrinking iOS onscreen shift keys.