Interesting question!
I'd say times change, including the standards.
Jazz sought new directions and largely wandered away from those standards years ago. Meandered away might be a better term, towards a lot of jamming to demonstrate a groups ability to work together and play off each other.
"Standards" always originate with popular songs. Those still come about these days but in a different form than in past years that produced modern day standards. SOme of that, the ones that are most accessible to the most, will continue to be popular I suspect. Unfotunately, I can't think of any single artist since The Beatles perhaps that produce a large portion of the times standards.
I think the internet and information age changes the game forever, making it increasingly harder for any single act to dominate on a large scale, like say The Beatles last did years ago.