In reply to sky.

Really, there's only one Automattician whose opinion on this really makes a difference, and he's not decided yet.

Waiting. Watching. Waiting.— Matt Mullenweg (@photomatt) July 22, 2017

There's more momentum behind React right now, because there seems to be more institutional knowledge and experience by the developers involved in the projects that are working on it, but licensing issues can be a blocker and necessitate a pivot. I honestly could see it going to Vue before merging.