But really, 90% of companies don't need central authentication/Active Directory at all. They just do it because everyone else does it like that. Most admins don't know how to manage AD properly and how to nail everything down so you don't get owned.
I’d say there is a stigma around Linux in North America, if I went into a shop and every machine was running Linux I’d either think they are dirt poor or some kind of underground Russian secret service operation. It just isn’t seen.
Idk why you'd think they're poor, as people say: "Linux is only free if you don't value your time"
People are still using Windows simply because they are used to working with shit.