It’s hard to call something an “open standard” if anyone who wishes to use it needs to license patents from nokia.
(https://en.m.wikipedia.org/wiki/High_Efficiency_Image_File_F... under “licensing”)
If something needs a licence, it isn't open. I mean, it literally doesn't meet the definition of open.
What's more, if the standard was open, then that would be great, but adopting it so soon and setting it to be the default is woefully shortsighted.