I ran "The Rebel BBS" for years and years before the BBS world pretty much died. I don't remember exactly when I started, but it would have to be sometime in the early '80s, I would think.
Started out on an Atari 800XL. Moved up to a 130XE, then a 1040ST and finally a Falcon030. I even ran for awhile on a stock 1040ST with no hard drive when I first got it. Such was the efficiency of programs back then.
Most everything back in the early days was modem to modem. If someone was on your BBS, everyone else was locked out. Still it was real cool, and a little more personal in some ways.
I remember it was such a great feeling getting callers to my BBS. I ran the support BBS for BBS! Express for awhile, and I was getting traffic from not only around the country, but around the world. That was very, very cool.
Then along came FidoNet, which let you be part of a worldwide community, without worrying about busy signals, or even callers to your BBS for that matter. And then along with it, AtariNet, NeST and my own MusicNet.
I still kind of miss some of the aspects of sysoping, such as spying on someone when they're on your BBS

, but you can't beat the efficiency and pure volume of places like this and the various newsservers.