First of all, thank you for the kind compliments. From the start TS was intended to help anyone (even Windows users) with their tech products. Of course since the founders were all Mac users, Apple systems and problems were the headliners.As to your questions, yes, to all of them.
Occasionally I run across a clipping or note from the early days and am reminded of the travails of using SCSI, the problems with troubleshooting extensions and many other situations that just don't exist anymore. Apple products have matured to the point that most people can use them with basic tech knowledge and much of the population has grown up with computers.
When we started 21 years ago there were other forums and many allowed anyone to join often creating a commercial atmosphere or threads that were full of SPAM and often vitriol. We limited our membership to those who were sincere and agreed to exchange information that left out reference to "touchy" topics (politics, sex, religion). We've tried to keep things even handed, though we have had our mini dustups over the years. All in all, it kept the forum peaceful though it did limit our growth. Today there are so many other places to find answers that one need not join a forum like ours.
And yes, quite a few have retired or left, not just TS but this "mortal coil". Sadly, many of the founders have passed on along with many of the early members. Those of us who have survived check in perhaps less often as life has taken on other responsibilities. There are a few who thankfully are up to date with all the latest and attempt to fulfill our purpose. I, too, am thankful for the regulars who keep TS alive.