I wonder if the process can be improved by using long exposure pictures. You might know the effect from long exposures at night: the lights of the cars are in t

I wonder if the process can be improved by using long exposure pictures. You might know the effect from long exposures at night: the lights of the cars are in the frame, but the cars themselves have vanished. During daylight a similar effect could be achieved - apply a strong neutral density filter to the lens, so that the exposure can be increased to a couple of minutes maybe. The moving people, cars and so on are not still enough to make the sensor react. I was astonished when I saw this video (at approx 4:57 minutes in) https://www.youtube.com/watch?v=T24_uq0AY6o https://www.youtube.com/watch?v=T24_uq0AY6o where the stream of people has almost vanished. I wonder if the results could be the same but with less data, when you just take a couple of long exposures and merge them, removing all things that are too soft (-> movements) in the process. However this is a really cool idea for a photo project :)