I've have been pondering about it for some time now and there is a reason for it.

When I compare my animated encodes frame by frame, I see that some frames come out with blurry mess but others come out better than HEVC at equivalent quality. So am I supposed to compare not still frames but frames in motion to quantify the fidelity in AV1? Or is that an area where the encoder still need improvements?

I've also experimented with temporal filtering on and off, sometimes it looks better, other times it butchers the fidelity.

I've been experimenting with AV1 using FFmpeg with SVT-AV1 for 2 years. I've encoded quite a lot of my videos in AV1 by now, mostly just animated content.

AV1 is really good for an open source project, no doubt about that. But after so long using it, I can safely say that it is really just good for storage saving with excellent quality-speed tradeoff, however, it lacks fidelity. My major discontent with AV1 has been how the encoder blurs some details completely out even when setting crf as low as 14 whereas HEVC doesn't at all. Edit: Also in some instances, particularly with non-animated videos, AV1 performed way worse than HEVC which I believe is due to it doing a poor job in varied and difficult scenes.

At first, I thought AV1 is only better for animated videos but later I found its really just any video so I've switched back to using HEVC for storage and decided to use AV1 only with preset 6 and fast decode on for mobile devices.

I don't mean to say that AV1 is bad, it does provide better quality than HEVC for sure but I wouldn't call that an upgrade when HEVC still has the major edge in fidelity.

It makes sense for VOD services to make use of it but personally, I wouldn't use it for anything except quick and super low bitrate encoding.... for now.

Mozilla redesigned the browser 4 years ago. At that time, I was expecting this change for the best, making Firefox as advanced as Chrome, if not more and more intuitive while still retaining the simplicity of UI, is what I thought.

4 years on and I still can't make myself go back to FF. I miss the old simple UI. You could choose any extension from the extension store and personally, the best part was theming which is all gone! The browser is now all clustered. And Mozilla is still using the old screenshots of the browser in Play Store, I wonder why.