Certainly there are are a lot of formats out there, and it's not reasonable for Evernote to support all, or even most of them. Still, given that new iOS devices default to HEIC format, I don't think it's too much to ask Evernote to support one more format. Especially since OneNote either supports it or is converting the file on the fly when it's added to a note. Considering the size of the iOS user base, HEIC use will probably increase dramatically.