Happy Birthday Alfred! He was certainly a big influence on me in my student days. I owned the Vox Box set of his complete Beethoven in the 1970s and his recordings were instrumental in introducing me to the Beethoven sonatas.
Yes, his playing can be rather turgid, but on balance I found him to be an adept interpreter. I have since found other performers whom I regard more highly but that is all part of the enjoyment of these works, the huge range of performance interpretation one encounters.
He had that egghead, scholarly reputation since he came on the scene. I suppose it's fitting.