Sure the early 2000 internet worked. But it was what it was back in the 2000s.

Im not trying to convince you of anything, but making post request and sending get request to check if anything changed isn't better than having sockets and real time data transfer.

Javascript is being used for a much more than spying on you and if it wasn't so important and so easy to use, we'd all be having to send a thousand get request a minute only to be able to receive a chat message.