I don't think multiple location of servers is needed. XI had consolidated servers as well and only now came offline due to a natural disaster. These are rare occurrences, hardly placing it at the top of the priority list. The added cost equates to an unnecessary insurance policy.

Besides, more blame for the server situation could be placed on TEPCO rather than S-E, as they missed inspections at at least one plant that could've helped to avoid (or at least mitigate) power shortages and reactor meltdowns.