Cliff Williams has played bass in AC/DC since 1977. By the time the group’s current tour wraps up in September, he’ll have logged nearly 40 years with the Australian rockers. Apparently 40 years is long enough. Williams says his future plans don’t include continuing with AC/DC. “It’s been what I’ve known for the past 40 years,” Williams says. “But after this tour, I’m backing off of touring and recording.” […] “Losing Malcolm, the thing with Phil and now with Brian, it’s a changed animal,” Williams says of the band. As for his decision, “I feel in my gut it’s the...