@Fritz-Ferdinand von Pinguin Uhm....... Why can't you just connect to discord with your normal browser? or telegram? or IRC, or why don't you connect your mailserver with your normal browser?

Usenet is basically lot's of what the internet in the early days was. And even more. Usenet did allow you to communicate with other peoples in so called groups (nowadays we call them forum boards;)), and in contrast to nowadays forums where you all are on a island, usenet was a globally connected network of message boards and threads where you had lots of options to connect and get your own feed.

As example, for transfers between systems which where not 24/7 connected (remember, internet wasn't everywhere back then), there was a dedicated data protocol called UUCP (Unix to Unix Copy) which used standard modem dialups to transfer messages and sometimes even files over some distances and even across several "hops" aka servers. (That's why it's still called 'hops' in traceroute. ;))

So...

Why browsers never evolved to include a good NNTP (again another later usenet protocol) reader.. well it wasn't their part. It would have made way more sense to get included into a mail program. But they had their very own development anyways and there already existed very good uucp/fido clients back then...

Overall, UUCP is often said to be dead .. but those who said to be dead are living longer than anyone else.. ;)