Remember that we were dialing into these things with modems; the number of users that could be logged on to a BBS simultaneously was limited by the number of modems, phone lines, and possibly computers (because you couldn’t take multitasking as a given in those days) that the operator of the BBS was willing to pay for. All of these software packages offer paths to getting old door games running on modern systems, and if I was looking to replicate the old school BBS experience as closely as possible, I would grab one or more of these and be on my merry way.