Does the creative process slow down as you age and do you “loose it” when you hit middle age? I like Degas take on it – “Everyone has talent at 25,” which is true, “the difficulty is to have it still at 50.”
Laura Cumming briefly looks at this in http://www.theguardian.com/artanddesign/2015/nov/15/seven-ages-of-an-artist-laura-cumming which is worth a read for Carmen Herrera quote in the final paragraph. Enjoy.