Why can't good songwriters continue to write good songs through their 40's and on?

[Cool As Ice Cream]

Originally Posted by pavementtune

PJ Harvey, you could start with Is This Desire or maybe Rid of Me.

for a Kate Bush starting point I'll refer to you CAIC - the only album of hers I still love is the newest one, 50 Words for Snow.

i'm not really the one to ask, but hounds of love.