Edit: You bum, had you been paying attention to any of the video codec news you would know that HEVC is only marginally better than VP9. The reason why this matters so freaking much is VP9 is OPEN SOURCE. The last great open source video codec was Theora I believe which was on par and now arguably superior to AVI.
The fact that youíre comparing a container (avi) to a codec (Theora) kinda invalidates all your points. Also itís good that it is open-source but more importantly that it is free to use, without any licencing fee. That is the unique advantage VP8/9 have compared to h264/265.