My guess is deteriorating physical and mental health and just damn getting older
.
I wonder if Brian will record again at his current stage of life. There are good arguments for either way.
Grateful we still have him though.
In the initial post-Landy years, Brian seemed really energized about making music - minus the "collaborator who never left me alone". It's hard to believe that was 25 years ago. Like all of us, Brian is a lot older, and probably just dealing with getting through each day as it comes.