If you only buy one game a year, you don't have a reason to keep up with game recommending media, so you won't run into everyone saying Silksong is better, just whatever game gets its advertising blasted into the general non-gaming media with the largest marketing budget.
(Also I think there's something good about releasing a game every year! If you play a game at 12 years old and the next game in the franchise takes 8 years, you're not anticipating the next release, you're in college.)