Very likely they might use some common frameworks that are shared between macOS, iOS, and watchOS to design (e.g. SwiftUI) and writing the whole stack for non-Apple platforms simply wouldn't make sense.
Understandable and quite possible, however that seems like a relatively lazy thing for Apple to do.
I'm not entirely sure what's the use case for most of these cards, but I'd hardly be surprised if this kind of decision didn't affect usability and accessibility for a lot of iPhone users, just because their venue guys don't have a mac.
And it's not like apple doesn't have the resources to make this software run across different types of computers. Iirc itunes and bonjour are (still?) very much developed by Apple for windows.
They have the resources. They don’t care. Same reason it doesn’t work on older versions, they don’t care.
Honestly in this case I don’t blame them. This is a niche little app. It’s great it’s available but it’s not going to drive sales. Spending the time and money to make it work on Windows isn’t going to move enough needles to pay for the development time, QA, and support.
Not having to make it work on older versions of macOS also saves time and money. Everyone upgrades eventually. Just wait them out and the users will be ready one day.
