That’s actually pretty standard. Yes you can cherry pick a few BP winners from the past that remained popular/ relevant for a long time. But for the most part they fade into obscurity like everything else. Kind of like NFL drafts, you really don’t know for 4 or 5 years who was really good. And of course these days they have the problem of sheer volume, with 4 major releases a week and usually 4 arthouse release a week that’s 400 movies a year, it’s really hard to stay relevant through that much noise.
The golden era had even more being made but it was practically the only show in town for entertainment dollars. The movies that are remembered from the golden era are a select few as will be the case from our current time. Which will be remembered is the big question. Perhaps fewer or even none. There has to be something that raises a movie above the usual detritus to be able to viewed by someone long after we have all shuffled off this mortal coil.