I have no real idea about the purpose and inner workings of those Google companies, but being a Google-adjacent company is probably not a great predictor for success, because big G needs to eat to sustain the behemoth
and there's also too much fat on these companies to be business savvy, so they seem to serve as G hiring pool, or G vacation destination for burnt out G folks.
Also G companies might aim too high even when they try not to? OpenAI can release a shitty chatbot, but a G subsidiary simply can't, they want to solve proteins, aging, cancer, and then maybe we can chat.