I got my modem working in Slackware in 1997 - but the PPP driver (equivalent of WinSock - which worked in Windows quite well at the time) would only work during the first boot of the system. After a reboot, PPP would never return, and the best I got out of the internet about it at the time (mostly using my Windows PC) was "real men connect to the internet through ethernet."
Between that an the useless (unless you enjoy frustration) sound drivers, I declared Linux "not ready for prime time," and left it to others until starting back in via Cygwin in 2003, then Gentoo (for 64 bit access you couldn't get any other way) in 2005.