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since reading on twitter is annoying with all the popups: https://archive.is/ETVQ0
I am always amazed that many of these things (Unix, C, IP, Ethernet) were developed in the 70s/80s and are still relevant, useful and today. At that time, people also had a technical interest in developing software and had to deal with very limited resources, maybe this is no longer the case in many cases today
i am helping maintain a big automation system for a customer which is generates several million in sales per year and is built just with simple unix tools, perl, mqtt, nginx - a very low tech stack - running on a small 2 core machine.
the cloud-based solution that existed before had enormous performance problems, ran unreliably, was difficult to debug and was several times more expensive in terms of both development and running costs