Nobody knows what to do with it because it's proprietary and requires a license. If it was not encumbered, windows would ship with a decoder built-in for free and nobody would have a problem. If Apple devices didn't use it by default, no one would have a problem because they just wouldn't use it for anything ever.
If Apple got sick of paying the fee, they could switch to AVIF or JPEG XL or anything else. It wouldn't be hard, just bake native support into the next OS of everything, and have the next iPhone take pictures in that format by default. The rest of the world will catch up right quick.
Actually come to think of it I'm kind of surprised Google doesn't do that. Make the native Android camera shoot in AVIF by default...
The article suggests this was a more secret room, not the sort of thing any random person could join.