It's CYA. Nobody ever got fired for buying IBM, the old saying went. And it was true. Perhaps they should have, but they weren't. Nowadays, Oracle and MS have taken that position. They have the "share of mind," a PR concept that unfortunately succinctly expresses the problem. Someone proposes MS or Oracle, and everybody nods because they've heard about it. If that causes problems, other people will have to solve them anyway.