Damn - that is a bummer. I always loved Barry and looked forward to seeing what new kind of bizarre vehicle he's going to roll up into a storage unit in. I guess he must have gotten tired of having boxes and bins fall on his head all the time, and he does appear to be the most senior of the entire cast and is probably ready to retire.
Yeah, this may be the final nail in the coffin for the show - although my wife and I both agreed last night that we don't miss Dave one bit. Glad the "YUUUUUUUP" tool bag is gone.