Comment by scarmig

I think this is a pretty key point. If a business is going through any kind of rapid change, cloud providers offer a lot of off-the-shelf help for that, be it ability to scale, hosted infrastructure, or PoPs in new geographies. If the company is relatively static with easily predictable future requirements, you can get a lot more bang-for-your-buck by handling things on your own and developing your own in-house expertise.