The reason you see more complaining about not getting the update was because that's one of the selling points of the Nexus/Pixel phones. Samsung doesn't mention updates as one of their selling points. Apple does, but they don't appear to do much in the way of staged rollouts. I remember talking to a Verizon CSR after they got the iPhone, and I remember them complaining about issues with iOS, and how they weren't allowed to do much in the way of testing prior to rollout. So their techs were being flooded with issues about the recent iOS update. And while users may get impatient with the length of time the rollout takes, better to take your time and catch potential serious bugs rather than put them all out in a week and then have more devices affected and needing a fix quick.
As for the Check For Update button now forcing the update, I haven't had any issues with it working as specified. Last Monday, November 5th, I updated my Nexus 6p, and both my Pixel 1 & 2 to the November patch. Both Pixel showed the update within seconds of checking. The Nexus 6p didn't show up right away, but then I saw an update notification in the status bar about 10-15 minutes later.