Simply, people are not willing to pay the price. All of that extra planning requires more man hours. It also requires people, who come at significant cost, skilled at working in such environments. People want to use their Blackberries for hundreds of dollars up front and tens of dollars each month, not thousands of dollars monthly.

It can be done, but the market has determined that it does not want it to be done. It would rather accept some downtime and other problems in order to access the technology at a lower cost.