Those few bigger companies that I have talked to, just do not like the idea of having their sensitive data or parts of their critical infrastructure in the hand

Those few bigger companies that I have talked to, just do not like the idea of having their sensitive data or parts of their critical infrastructure in the hands of an other company or accessible via internet. I can perfectly understand that. In Germany for example some laws make it hard to outsource data processing especially if customer information is included. One example would be the fud about whether German websites can use 'google analytics' without breaking certain privacy laws. Some of my clients are based in third world countries. Although they have satellite based internet, the latency is annoying enough to want something local.