For the last part, my guess is that the advantages are much more valuable in an EV than they are in a phone (where batteries are mostly fine. While longer life and faster charging are always nice to have:they are just that: nice to have), so if you are A) production limited and B) they are still more expensive (the article states they expect them to be price-comparable by the end of the decade), then they probably aren't worth it in a phone (yet).
When price comes down and production comes up (assuming those things happen), then I would expect them to start appearing in phones as well.
When price comes down and production comes up (assuming those things happen), then I would expect them to start appearing in phones as well.