I, too, hope AP will come up with a suitable replacement for the "portable" iFly devices--the 740, 740b, etc. Here's yet another reason:
Facebook post about flying in hot weather
In case that link doesn't work, or you don't care to log onto Facebook, here's the relevant text:
"104° at Ozana, TX (OZA) yesterday! It was so hot in the plane that my tablet shut down, taking with it my GPS. Happily, I was following I-10 to Burnet, TX (BMQ) so didn't get lost. My son, who is a licensed drone pilot, said that he used to strap an icepack to the back of the tablet to avoid this problem."