问题：

[多选] What are three common reasons why customers are saying that they need to evolve their datacenter?（）

A . architectures that is inflexible and inefficient
B . desire to use the same vender for desktop and server deployments
C . selecting best-performing vendors for each individual component
D . existing equipment has reached and of life
E . increasing operational costs of managing data centers
F . demand among users for access to information anytime, anywhere