In computers, "it" is mostly the "nobody every got fired for buying IBM" side of human nature. Business leaders are not techno-geeks, dreaming of bigger and better federated services. IT is generally a major expense - both on their bottom lines, and in the amount of time & grief they have to spend learning & deciding about and fighting with computer sh*t.
Metaphor: If the weather is iffy, and they still decide to fly on Microsoft Airlines...well, they'll have plenty of company and sympathy when the flight gets canceled and they're late. Vs. if you're the maverick who takes the train - then the whole extra load of figuring out train schedules and stations and stuff is on you (vs. "everybody knows" about air travel). And anything going wrong with the train (when Microsoft Air gets there okay) makes you stick out like a steaming pile on the kitchen floor.