I am not a fan of the enterprise-wide approach. Top-down, mega mandates rarely works in the real-world.

I will give you an example - if you were in the industry in the 90s you probably witnessed the hype cycle on data warehouses. Conceptually elegant, logically right, but in practice they lost out to the data marts. The business could not wait for the central, enterprise-wide data warehouse to come to fruition.

Enterprise-wide efforts are better off focusing on interoperability, on harmonizing autonomous systems and services - mandating the implementation is a slippery slope.

Now, there are exceptions, as always. First, capabilities that are about running the business, as opposed to changing the business, are more amenable to the enterprise-wide approach. But then, there is always the question - why do you want to have it on-premise? why not outsource it? Second, the maturity of the capability plays a significant role in making it amenable to the enterprise-wide approach. One could argue that analysis/insight werent mature enough back then, that they still arent mature enough. I wonder lately if email has crossed the threshold where the question now needs to be asked - do I need to have my email on-premise?