All the modern features that you see on the web have gone through the flag method at one point. In JPEG XL case it failed not because it was behind a flag, and

All the modern features that you see on the web have gone through the flag method at one point. In JPEG XL case it failed not because it was behind a flag, and the failure of one feature doesn't mean that the entire system isn't working. > Sounds like the flag method is a failure, and just releasing it actually works. No, "just releasing" doesn't work for the reasons I outlined above.