I built a retro 486 PC, bought a modem and could not find any dial-up ISPs in Australia. The 19xx prefix is not dial-able using VoIP line that I set up (we don't have POTS lines anymore).
I would - unironically - love to build an 'early internet' where we could dial in (or just emulate it via an intentionally low-bandwidth, high-latency layer over home wifi). Go back to chat rooms, islands of communities centered around a particular topic.
There is a device you connect to your computer port and it can emulate dial up. It connects to your wifi but your computer sees it as a modem, then you type regular AT commands and instead of a number it connects to telnet BBSs.