What Dusty says is right, and what Tony says may be true, but so far I haven't had much trouble distinguising between my truck and my wife, who wins hands down over any truck I ever saw.
This truck of mine was built 53 years ago for work and it still does better than most of the expensive new junk on the road today. If you've tried any of it you know what I mean. Seems like a shame to let all that old heavy gauge steel go to waste under a bunch of frills. When you have a good piece of machinery (that's what it is, machinery) you ought to use it. Treat it right but use it. Then pass it along in the best shape possible to the next owner who can moon over it 25 hours a day if necessary.
Using a steel floor sure doesn't mean the truck will be any kind of wreck. But if it that ever happens (and before I am) at least we'll have a good no-fuss trip along the way to getting there. That's why I plan to lay down a steel deck. Next guy wants to toss it and do a piece of cabinet work on the floor, I'll leave him a good start and maybe a few good wishes.
4onthefloor's suggestion of reversing the wood and steel makes sense except you might need a block and tackle to move it otherwise you might damage the wood wouldn't you? Which is back to square one.