Still got mine. It's in the flight bag. I take it along for checkrides and the like, but happily I'm not asked to drive it. I think I still could. I hope...
I use the Jeppesen calculator for serious flying, except when I do the plog on the PC before setting out (Excel does it all for me, then) I suppose if my battery ran out en route...
I've still got my old O-Level slide rule, too (the trusty "Universal II") and don't use that either.