I have a Nexus 4 and have used Google Now extensively since it's inception as a hands-free system in my car. Since the inception of the Pixel and Google Assistant, the system has degraded significantly. Now no longer works when the Maps App is in the foreground, instead Maps seems to have it's own VR solution that doesn't work well at all. Saying "Ok Google, send a text to <wife>, I'm on my way home" no longer works, it opens Now with a search for exactly what I said. At one point you could say "remind me to wash my ass tomorrow" and it would just work. Now it prompts "ok, when would you like to be reminded to 'wash your ass tomorrow'?".
This degrading of UX is very common with Google through the life cycle of products. What's going to happen to Google Home next year or 2 years down the road? We saw OnHub get castrated in less than a year after launch. The Nexus Q was still born.