"He's unlikely to produce anything in future"

I can't see why not - here's - "Shane's yule blog: sleeping, gigging and holding court", written this week, and still pretty eloquent:

"Some of the touring party are as bickering and bitchy as ever from time to time, but that's to be expected with the group history. These days, it's all carefully managed into a productive, well-oiled machine, pun intended. The cracks are smoothed over and the old animosities aren't flattered with the opportunity to make waves. Once we're on that stage we become the troubadours of old, and we make our joyous noise."

If he can write like that he can still write songs.