What I mean is that these kinds of people usually look at the financial cost per year for a given solution that's already in place and always look for something cheaper (usually only on paper).

Usually they look at the cost of a licence without giving a single thought about, let's say, the processing power that'll be needed for the new thing, the expertise to set it up and run it, and all the migration work that will be needed to make the switch.

Also, when these things happen, most of the time you have to fire/hire/train people to adapt, which means you lose some of your internal knowledge and experience. That's something that can't be really quantified and can really hurt an IT system.

In the end, with all the cumulative costs, it's often far more expensive to switch solutions, and not financially speaking, but that doesn't necessarily appear on the bottom line they will see from their desks.