The SDS (sudden death syndrome) was why a lot of Wingsters switched from Yuasa. It's usually a short between plates in a lead acid battery. Better to swap early than end up stranded on the road. I started swapping every 2.5 years after being bit once on 2 different styles of Wings. Seems a good early swap on the FJR would be about 3 to 3.5 years.
I find I'm less tollerant of ride interruptions the older I get.
I'd rather swap 1000 miles early than end up on cords, nursing a tread set home, or trying to arrange a tire install on the road where pricing isn't negotiable.
With batteries, I'd rather swap it in my garage with my tools than on the road in BFE.