RIP. The wars today are WebP (Google) vs. JPEG-XR (Microsoft) vs. BPG ?! Maybe they will all also die... I only heard that WebP is/was used by Facebook and is used by Telegram.
"Some of the HEVC algorithms may be protected by patents in some countries (read the FFmpeg Patent Mini-FAQ for more information). Most devices already include or will include hardware HEVC support, so we suggest to use it if patents are an issue."