I am genuinely curious if we are only seeing tip of the iceberg so to speak and there are a much larger number of projects getting killed before they are even r

I am genuinely curious if we are only seeing tip of the iceberg so to speak and there are a much larger number of projects getting killed before they are even released? Although it does not affect end consumers, I am curious from an engineering point of view. Any Xooglers care to comment? I am not asking for actual numbers, but just ballpark numbers / estimates. If it turns out Google experiments in the open while others experiment internally and kill products too early, may be this isn't so bad after all. Society got to see what worked and what didn't.