Also I think Mbpro and iPad, or rather laptop and ipad are mutually exclusive. If you use one, you dont really need the other one
I dont think this is the case.
If i want to paint something or make fast Notes in a meeting the ipad ist way better.
If i want to build a presentation or work with excel or a scientifici document in word, the laptop is the way to go.
And i think thats what annoys many people. The iPad would be capable of working with full-scale Desktop Apps, but Apple DECIDES that the software will not run on an ipad.
Apple is trying to keep a hard gap between a full scale OS and iOS, and i really dont see the point anymore.
Ofc there is an obvious one: Money. Apple would sell fewer Laptops if the iPad could run Desktop Apps and had a better file Manager and could be more customized. I really think thats the only reason why we dont have a Mac OS running on an iPad.
(If they would release something like that, my Windows-Laptop and Desktop would have a hard time and the 12.9" iPad Pro would be a nobrainer for me)