Today Cristi Burcă (perhaps better known as scribu) announced on the WP-CLI blog that Daniel Bachhuber will now be the maintainer of the WP-CLI project. As Cristi notes, he's no longer using WordPress, so it makes perfect sense to hand off the project to someone using it on a daily basis.
Unlike me, Daniel is using WordPress and WP-CLI professionally every day, so he has a much better sense of what the paint points are. Besides that, he’s a long time contributor and has been leading many other open-source projects in the WordPress ecosystem. Therefore, I’m confident that WP-CLI is in good hands.
Kudos to Cristi for the immense amount of work he put into WP-CLI over the last three years, and here's to a great future for the project!