Extremely impressive but is it really sustainable in the long run? I personally do not think that working 16hr days is good for you in the long run. It is not healthy.
What use is he if he gets burned out in a year or two? Not much I would wager. Sure one might argue that this pattern of long working hours is crucial in the first few years of a company.
The question if he does so much more in 16 hours than he could have done in say ten or twelve? I doubt you can remain very efficient 16 hours per day.
I'm sure they would disagree with me but to be fair, will you make good decisions if you don't sleep enough and work 16 hours a day? I'm thinking sure, if this goes on for a short period of time but most people will eventually burn out.
Many can, of course, handle such working conditions but it can hardly be considered healthy in the long run.
What use is he if he gets burned out in a year or two? Not much I would wager. Sure one might argue that this pattern of long working hours is crucial in the first few years of a company. The question if he does so much more in 16 hours than he could have done in say ten or twelve? I doubt you can remain very efficient 16 hours per day.