Per this sale, BD is worth $3.25B. Just recently, Google paid $2.7B for two years of Noam Shazeer through the Character.ai deal.
This seems like a small correction if they wanted to reacquire and clearly the market isn't valuing BD all that high.
Why do you think it's one of Sundar's biggest mistake?
https://en.wikipedia.org/wiki/Noam_Shazeer
Can we go on a small tangent and wonder how we don't know when the guy was born?
Is it really that surprising that no-one has invested the time and effort into figuring out the personal information of some tech employee-turned-founder? I bet no-one outside of tech even knows his name.