[rifung]

> Didn't Rubinstein humbly then revisit technique and practise religiously in his 40s? (Not to detract from your point, which I think has value).

He did but I think the reason he did so was not because he felt it was better for the music but because he had children and he didn't want them to be lazy. I wish I could find the source but I suspect it was from a video interview so I'm finding it difficult to find.