iOS works well when you want solid control over institutionally-owned devices. This generally works best when you play by Apple's rules and buy through them and use Apple School/Business Manager - so if you're going for a BYOD model, this probably isn't the way to do [it]. There is a wide variety of management tools, but bear the costs of each in mind.
I think for every business in the world Microsoft Windows is a good use as standard OS system. It’s easy to use and a lot of other company's use it which make it very appealing for user to learn more about Microsoft Windows. The Office 365 suite is really good as a free feature and used a lot by every user of Microsoft Windows. If you got a designer business I would recommend other brands that are specialized in that kind of work. I feel Windows will come short on that end.
In all likelihood, common users will either already have experience with iOS on their iPhones, or will pick it up quickly. The UI is generally simple and mostly visual. Power users, on the other hand, may feel constrained by the inherent limitations built-in. Root access, terminal commands, and deep customization are not really to be found here.
It's easy to use, very straightforward, and user-friendly. It has improved over the years, but you still need to be careful not to shut it down improperly because that may lead to corruption and Windows being unable to boot. There is plenty of software available that covers most needs.
Lots of help articles online for just about everything under the sun. I have never personally had to engage Apple's support team to comment on their helpfulness.
The software updates have a wide coverage for iPhone models and I love updating software for additional features and/or improved software stability. It has also genuine feel of the phones they offer. Easier to set up and use. It helps me do more productive tasks. If I have the latest phone model, I would have additional software advantages that are already included in my OS.
Microsoft Windows and macOS are both useful operating systems. There are businesses who much prefer macOS and some that prefer Windows. Businesses that revolve around industries such as game design, art design, graphic design may opt to use macOS due to its optimization with programs that revolve around these topics. Other businesses that are more focused towards Data or text processing may opt to use Windows due to its familiarity across the world and ease of access.