Might as well just get a Chromebook and put Linux on it.
I get that there are definitely times when local processing power is necessary, and I lug my laptop around when needed. The iPad definitely works for me 80% of the time for me, and the important thing is that I actually ENJOY using it. That is worth a premium for me.
One of those things I could not do on a £800 - £1000 ipad. The other thing I could do on it, with the minor benefit of a retiner HD display
I made a decision to not buy a keyboard. I can type fast enough on a virtual keyboard and I have 2 Mac and 2 Linux laptops for programming.
My iPad Pro is my most used device at this time. I also have a Chromebook that, like iPads, is something I would recommend to non-tech family and friends to use. Most people don't need a conventional computer.
The only issue with iPads is the cost! I love my iPad Pro, but $800 for a 32GB model seems expensive, especially compared to my Toshiba Chromebook 2 that was under $300 with a 1080p screen.