That's also when the partnership with Rivian really takes off. Uber clearly wants its own fleet of robotaxis; they already unsuccessfully burnt a lot of money on it years ago. Looks like they're content letting other companies take the risk while helping fund them.
Uber also partners with Zoox and Lucid on self-driving, missing this wave may be an existential risk, so they aren't putting eggs in one basket. Nevermind a level of duress due to the Uber/Waymo partnership being (almost certainly) part of a settlement agreement regarding alleged IP theft from Google by way of Anthony Levandowki.
> ...they already unsuccessfully burnt a lot of money on it years ago
It was for the best; the Kalanick-era company culture wasn't (/isn't?) compatible with the levels of public trust required for successful self driving.
It's hard to see how Uber is in any way relevant to the future of self-driving.