I think I mentioned in another thread that we're thinking of dispensing with both our present FOH and monitor mixers and going with a single digital mixer. But I worry a bit about putting all our eggs in one digital basket. Not only do digital mixers (at least it seems to me) have less available work-arounds in case something - or - another fails in the chain, but with so much running through one unit, should it fail, then it's Show Over.
The obvious solution is to keep the old mixer (or another one) in the trailer just in case. We wouldn't have the same set up or flexibility, but at least we'd be able to limp through the gig.
While I've always liked having a certain degree of redundancy in the stage setup, I've never actually carried a spare FOH mixer around. (Nor ever needed one). How many of you guys do this?