It's not heresy. To my ears (not a violinist, but a performing and teaching musician) I have been disappointed with a number of his recordings, most recently his recording of the Beethoven Violin Concerto that I discovered in my vinyl collection. This is one of the simplest, yet most musical works in the repertoire and I think his recording with Munch/Boston seems to lack ... a lot. (On the other hand, Ostraikh/USSR is great. Not flawless, but worth every second.)
Don't mean to derail the thread ... back to RCA!