The thing is, there is a product that does what you want. It's a Surface Pro... just like you said; it fits the bill exactly. It's Windows, but that's not that bad, really. I get the Microsoft Store sucks for apps. Having recently moved to Windows from macOS and iOS I can agree completely. However, this is Windows and if you look around you can find what you need outside the store. There is a lot of software for Windows; much of it sucks but there's enough good stuff to get what you want done.