iPad was sabotaged by Apple themselves, as they never figured out how to position it, and what capabilities to give it.

Multi-tasking? Half-assed. Keyboard and mouse support? Half-assed. OS capabilities beyond iOS on a laptop-like device? Non-existent. This was additionally hamstrung by "just check a checkbox, and a half-assed port of your app will run on iPad".

We've now seen the same play out with MacOS: why bother creating an actual app when you can just run a mobile app? Even Apple's first-party apps do this now.