When there are many different programs and systems being used by a company it makes sense to have all of the operations taking place with managed colocation since it will be simpler.  With everyone following after their part of the operation it will be a lighter task for everyone when the technology is housed in one place rather than being carried over several places where the computers are in operation.  When the company is able to do all of the things that any business needs it is always better to choose the right path with everything housed in one place from that point on.