You have to remember how barebones the early internet and ARPAnet were. The systems were actually really badly designed. That's fine for such an early try at new technology, but we are here mainly by accident. ARPAnet was intended for military-only use, not for the public. The UNIX systems that ran it were badly designed and couldn't have handled the internet like it is today. It was only after IBM and Microsoft came around that the Internet really got wider public use. UNIX and Linux nearly destroyed the internet as we know it.
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You have to remember how barebones the early internet and ARPAnet were. The systems were actually really badly designed. That's fine for such an early try at new technology, but we are here mainly by accident. ARPAnet was intended for military-only use, not for the public. The UNIX systems that ran it were badly designed and couldn't have handled the internet like it is today. It was only after IBM and Microsoft came around that the Internet really got wider public use. UNIX and Linux nearly destroyed the internet as we know it.