The problem is social and bureaucratic. Business unit X wants to buy software that solves a certain business problem. Oops you missed this annual budget cycle t

The problem is social and bureaucratic. Business unit X wants to buy software that solves a certain business problem. Oops you missed this annual budget cycle that is tied to hardware purchasing, better try again next year. Or, great we'll help you buy that hardware, but there is a 3-6 month leadtime. So many organization had an adversarial relationship to their IT group. Even when they didn't want it, the structures prevented solid partnership. On the other hand, SaaS, or self-service cloud (either on-prem openstack stuff, or real cloud aws/gcp/azure) allows groups to manage their own resources while still having a central coordinating function. Working in enterprise software, I was am always surprised when I find a killer feature may not the functional value of something we've built, but that fact it works around some internal disfunction of operations between internal teams.