I vaguely remember having slack time when there was truly nothing to do, everything was humming along, nobody was asking for anything. It's been a really, really long time.
I don't think I've ever worked at a company that did not have an infinite, ever-growing backlog. Still, slack time has always been plentiful, but that is not because there is nothing to do; it is because a low stress level is good for the individual and is good for the company.
