As a small biz you often hire contractors and its important that they focus on delivering value, not adhere to pre-established tool mandates.

As for perm staff, computers are cheap since they can last for years. Windows, and Macs aren't that expensive in the grand scheme of things.

I do have a handful of Raapberry Pis in a food wearhouse but I'm not doing to demand any analyst to stop using Tableau on their mac when they digging through my order book looking for oppurtunities.