I don't much like the way Peter Pears sang it, and there are versions of the song itself that I much prefer. But I reckon it is a good song, with a number of interesting variants.
But "A tedious old standard" that "nobody sings" - there seems a bit of a contradiction there.
I've heard some powerful renderings of the song. I wasn't at Bedworth (and I won't be there this weekend either), so I didn't hear Snuffy's - but I know what he means.
I've always believed that when you find yourself desribing something or somebody as "boring" or "tedious" it is advisable to have a good look at yourself, to be sure you are applying the word to the appropriate person or thing.