I also own a Boox Air and I agree with everything you wrote. It is a device built for specific purposes. I get a ton of use from mine. It sits next to me all day for note taking, and I have my Kindle, Instapaper, and Safari Books apps for reading. I don't use it for anything else but that isn't the intent of the device. If you are looking for something all purpose, as you say, look for something other than eink.