The best test of whether someone is fundamentally capable of changing is how they handle suggestions that they admit are good.
I mean suggestions that they acknowledge take little or no effort on their part to do, have only a trivial cost, and will make their life better in the long or short term.
One such suggestion (I think) is remapping the caps lock key to something else, like control. Hardly anyone in my acquaintance uses caps lock. But they are unwilling to remap it, even though I offer to do it for them and point out that if they don't want to use it, then nothing will have changed in any case.
Some people I know have adopted such a change and are quite happy for it. And so far, those people are by far the most open to new ideas of anyone I know.
Naturally, this is very biased. But I do recommend testing it out. See who will take a free lunch when it's offered after you convince them that it really is free.