Why do you feel HEVC is any less viable than AVC? At this point in time, as long as you have a digital file and a copy of FFMPEG (the Swiss army knife of video), you'll more than likely be able to convert to anything else later.
However, that's still not answering why you think HEVC (supported by some puny little company called Apple on all of their hardware) vs any other codec. It's not like they chose Cinepak or something else as ridiculous. It's the most modern codec with the longest legs of viability.