You should take into consideration the additional load this would generate on IT, both short and long term.
The transition would be relatively costly. As would all the support tickets that go in for users asking "how do you do x. In word, I used to be able to click here and here and now it's not there"
The other area i would be concerned about it excel. Many organizations rely heavily on excel and moving to another type might make calculations, pivot tables, etc, break. You'd need to do a feature analysis across a variety of use cases and roles. (And I'm pretty sure the finance team would poison your coffee for even suggesting moving off excel)
Good. We need more programs like this. It would he nice if dental was just part of our universal Healthcare, but this is a nice alternative