I've also been CTO at mega bank and hedge funds where we've rolled these out along side laptops. I've found that after initial objections, folks tend to agree. After a month or two, white collars who are not devs generally have switched to carrying the iPads, not laptops. Then the support costs basically go to zero, which matters a good deal at scale.
Users do have to think differently. That's ROUGH. Employees will ask for their old thing back if it changes their workflow, period. (See the book "Who Moved My Cheese?")
If they just use it, they generally find out it's fine. Could even be argued the Office / Teams ecosystem is superior.
Bonus: Letting employees have TWO screens (MacBook + iPad) also gives them two retina class monitors, portable, fantastic for hoteling or remote work or work from home. Two screens are better than one, and two that go with you are amazing. The new keyboard/cursor sharing while each device runs its own apps, with copy paste and drag drop between them is even cooler. In this model, the iPad Pro can become a Teams or Slack device, for instance, while other work stays on Mac, so you just wander off to a meeting with your collaboration tools intact. Instead of picking up where you left off, you just pick up and go.