That was the era of "every second counts." Every second has meaning and purpose and adds something to the narrative. The Fifth Element is another good example, and almost 30 years old. Now in the age of binging, where a 2 hour plot is stretched into 17 hours of TV, there is SO much filler and downtime and it's honestly just offensive in comparison.
I kind of enjoyed Pluribus, I liked the concept and what they did with it, but there's way too much forgettable filler that dilutes it into a slog. The movies I mentioned are (again, IMO) absolutely gripping and just lean and mean storytelling vehicles.
That's the problem with nostalgia, you don't remember all the bad movies you had to watch just to get those two gems. Someone probably suggested those movies rather than you stumbling onto them. That's pretty much the job of a critic. Siskel and Ebert in the 1980s would often talk about the pain of having to sit through hours of awful movies every week just so that they could find one or two worth recommending.
Sometimes, cultural decline actually does happen, usually eventually followed by some kind of renaissance. Anyone who has studied the cinema, literature, etc. of a certain country in the past knows that there are "hot" periods and "cool" ones. When we see this phenomenon in the past, it doesn't tend to trigger the same defensive reaction, I guess because it doesn't feel as personal.