avif image format : also 10- and 12-bit, has anybody experience?

[alain]

Hi

I've noticed that the new image format avif has also 10- and 12-bit options.

Given that it will be probably pushed hard for web use (far better compression than jpeg) and is "free", will probably give it a high usage.

Combine that with a 10-bit option and it could be a nice format to use for those that find 16 bit tiff to "heavy". 

Has anybody already worked with it?