Does anyone remember the green songbook before the pink one? 1950s + 60s. It had music which, even to a child, sounded holy. The reason given for chucking the green one in favour of the new pink one, was because the songs sounded too much like hymns. Definition of the word hymn : Song of praise to a deity.
I never liked the brown one when it came out. Calling the newer songs pianistic is ever so polite. I thought those ones sounded as if they were written by Beethoven \ Chopin wannabees, and I have read more meaningful lyrics in Rupert the Bear. My favourite song was " The heavens declare god's glory." Did that one make it through the filter?