Google does not want to get rid of Chrome because it is by far the best source of “signal” that they use for training their systems. For example Chrome browsing

Google does not want to get rid of Chrome because it is by far the best source of “signal” that they use for training their systems. For example Chrome browsing stream data is the largest signal used in ranking search results. Google deprecated PageRank in large part because interlinking was a proxy for user interest, and now with Chrome they can measure user interest directly in real time.