> stop artificially limiting what iPadOS can do

Why would they do that when it would remove the incentive for their customers to buy one of each?

Give the iPad range Mac features, and it'd cannibalize Macbook sales from the bottom up. Give the Macbook a touchscreen, 5G, and the ability to run iPadOS apps, and it'd cannibalize iPad Pro sales from the top down. Neither of these are in Apple's commercial best interests.