What is the technological concept explaining the persistence of QWERTY despite the mechanical problem vanishing?

Path dependence

The enduring dominance of the QWERTY layout, even though the 19th-century mechanical constraints it was designed to solve (type bar jamming) no longer exist with solid-state electronics, is a classic example of path dependence in technology adoption. Path dependence occurs when an installed base of a technology becomes so large that the costs associated with switching to a theoretically superior alternative become prohibitively high. These costs include the expense of retraining vast numbers of operators, retooling manufacturing lines, and overcoming widespread customer familiarity with the incumbent standard. Consequently, the original, historically necessitated compromise remains locked in place by business momentum.