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SAP was built in the seventies on seventies technology, which it still uses today (ABAP).

The Internet was built in the seventies on seventies tech, which it still uses today (IPv4).

I'm not disagreeing with the rest of your post, but this is a dumb yardstick to use.

You make my point perfectly.

The internet is a perfect example of technology that is constantly evolving inspite of it's roots.

The internet hasnt changed much since the 1970s, IPv4 and TCP/UDP are still the same standard. Only some physical layers have seen innovation.

cf. IPv6