"ePub and Kindle formats are available form the MagArchive. Both support text resizing, font choice, hight contrast etc. My Kindle will even read them to me. Not discounting complaints about the print size, just letting you know alternatives are available. "
A couple of things come to mind. Not everyone can afford or justify the extra cost of these things.
Nor is the tablet a good substitute for a decent paper magazine, sometimes there's more to it than just the written words in isolation. The layout and the pictures help create the world that the writer is presenting.