DDG is absolutely emerging, usage year over year is rising rapidly. I’ve personally switched over to ddg after years of jumping back and forth. It’s finally good enough. For the Indernet as whole to switch over will take time. One thing that keeps customers coming back to google is the integration across their applications, i.e. email, collaboration (google docs) video (youtube) etc. That being said, I don’t really feel theres much of a benefit being logged in when searching, so I think search engine traffic could switch over to e.g. ddg while people still are heavily invested in other google services.