You are so right @Cold Sweat their music really does have a timeless feel to it. You can pick tracks from across thier catalogue and it would be hard pressed for someone new to their work to say when it was recorded. Let's not forget their influence on other artists, not least the sampling community along with bands like Coldplay. Orchestral Manoeuvres in the Dark named one of their albums 'Organisation' after an early Kraftwerk incarnation.
I have been fortunate to see them live, I still have the ticket stub from a concert at Sheffield City Hall.
It's odd because I regard their music as a quintessential dated product of its time. Titles like "Pocket Calculator" can't be described as timeless, their strength is they are very specific to their time and nostalgic. Pocket Calculators were a marvel of the age in the 70s. Today, they're just "meh". Rather like Punk, Britpop, Madchester or 2 Tone they are very much of their time.
It's rather like the "Googie-style" or "Jetsons" architecture of the US in the 50s and 60s - the "space-age" diners. That optimistic faith in science and space exploration of the 50s-70s really appeals to me but human aspirations have shrunk since the 60s. No flying cars, no robots, no moon nor Martian colonies etc. No contact with aliens.
But all that would mean nothing if the tracks weren't any good. Kraftwerk were genius at electronic music. They changed music for the better forever!