I'm afraid of having mine done (neck-vertebrae replacement w/ free tracheotomy included) and have put it off for 2 years so far. My neurological condition continues to degrade, but I can't imagine myself functioning speechless(!)...yet.
Good luck, my friend.

I think it's a sign of true 'business integrity' to consider one's clients as a part of one's posterity. The prevailing view is more likely, "Screw 'em; it won't be MY problem any more! I'll take my passwords and proprietary code WITH ME! Ah, yes; they'll miss ME when I'm gone...." We're all going to get 'benched' eventually, but the game's bigger than any of us and WILL go on. There's no good reason to handicap your own team when your playing-time's up. I expect that employees--as opposed to us 'sole proprietors'--may feel some 'job security' derives from being *indispensible* in their world of office politics and peer competition ("They CAN'T downsize/fire/outsource ME; I've arranged for the company--or my part of it--to crash and burn without me there. I have made myself indispensible in some way, and there will be wailing in the lodges here at XYZ.net if/when I'M gone!"). Sand in the gears of an unloved ex-employer is a far different thing from sabatoging one's OWN posterity. For one-man-bands, the only ones who stand to suffer inconvenience or tangible loss when you check out are your own clients and loved ones; morbidity notwithstanding, I recommend 'getting the affairs of your business in order' right now, while the Sun is shining and you feel good. One day, your clan AND your customers will rejoice at your commitment to the craft to which you applied yourself here.