Counterpoint: railways often get abandoned out of lack of use. Europe no longer has a reasonable network of night trains. Horses used to be the main mode of tr

Counterpoint: railways often get abandoned out of lack of use. Europe no longer has a reasonable network of night trains. Horses used to be the main mode of transportation for centuries. Now they still exist, but as a tiny niche. Sending letters by post was a mainstream thing. Now it's only travel cards for a minority who cares. FreeDOS is still developed. So is BeOS/Haiku. But good luck finding anyone using that on a laptop in a cafe. I wouldn't be surprised if a few enthusiasts still used IPv4 in legacy software in 1000 years. I would be very surprised if it remained mainstream.