Microsoft Corp's plan to end support for the Windows 10 operating system could result in about 240 million personal computers (PCs) being disposed of, potentially adding to landfill waste, Canalys Research said. The electronic waste from these PCs could weigh an estimated 480 million kg, equivalent to 320,
I’d imagine it would have been some gprs-modem through an adapter for sms notifications, that was added afterwards in the 90’s
There is a device for connect it to internet, via an ethernet cable and with some software, for bbs by example.
Getting a C64 to host an remote interface page would definitely be “beyond the call of duty”.