It seems as though the original poster is complaining that the iPad doesn't
do what it was never designed to do, never advertised that it could do and
thus shouldn't be expected to do. Should a Ventus 2 be criticised for not
being able to carry a passenger?

Apple has made decisions regarding what can and can't be done on iPhones &
iPads for many reasons including security and usability. These decisions
mean that some really neat features (such as unrestricted file management
so you can download and export avionics updates) are not available. They
are on competing devices but those devices won't have some aviation
specific apps that may be important to you. You need to prioritise your
requirements and decide accordingly. The fact that ForeFlight, Logten Pro,
OzRunways et al refuse to make their apps available to other devices is
telling. They like what Apple does and how they do it and as they receive
no financial reward from being sole-platform (quite the opposite in fact),
their decision is based on the user experience available to iOS users.

Choose iOS/iPad, Android/Samsung Galaxy, WindowsRT/Microsoft Surface etc as
best suits you. Just don't buy a Cobra trailer and complain it doesn't tow
your boat.