Well, I think musically he never WAS in his 30s. I remember great songs like "In the Gallery" (especially live versions), or the incredible "Southbound Again".
All very mature and great and full of energy, even if those are not songs that I would call fast. However, he had a period of writing where he used to produce some "childish" stuff I never really liked: Do America, Quality Shoe, so-called "fun"-songs...
So I am glad he writes now stuff that really suits him and his age. But "no fast songs": I would dream of a little more tension. Examples: "Wanderlust". It
has a very special atmosphere and is not boring - also "You Don