The Comedy Silent Films were very popular on TV when I was a kid, but often the humour seemed to partly rely on the fact that everybody moved very quickly. I grew up thinking that was the way they were made, but only in recent years found out that it was a mere chimera of the frame speed - or something technical like that. The fact remains they had value until the coming of clour, then they dropped off the TV screen - one innovation too much for their survival, although some were colorized I think.
I very vaguely recall a Valentino Silent being shown, because it was "classic" and I remember thinking it was hilariously stupid in every way, but I was only a kid back then and didn't know much about the differences in era's and changes in society, etc etc....... I think Metropolis got a showing too though, and I recall enjoying that a lot, so maybe it's something to do with pap only ever being of the moment, but true worth has a universal appeal and this can be paramount in terms of longevity of enjoyment.
I imagine silent movies were being rapidly re-made as talkies too, so the "original" became redundant as the new improved versions came along. We see this happening today, with many Sixties/Seventies films being re-made, perhaps with CGI, or some other improved special effect or conveniently revised social more. This has already led to the version of "Assault on Precinct 13" made recently, occupying the TV Movie schedules for that slot, and consigning the 1976 brilliant original to the dust of forgetfullness. Twas always thus maybe.