Me three! But "small" is a relative term. Some of our regulars are tied up with real-life situations right now, so things were sometimes just a bit *too* cozy until this recent batch of new members came along. And I must say, you folks are very welcome!
Even when things were really humming with discussion of a new series, this forum has rarely had more than a few people on at a time, largely because members are spread across so many time zones. (We tried having a chat room, but no one ever knew when anyone else might be in there, and it was finally closed.) I find it useful to think of the forum as more like email: I go online, read the new posts, and respond -- then next time I go on, there may be responses to what I posted before.
Right now we're in kind of a lull as regards several of the usual regulars. For example, one is moving to a new place, one is a health-care worker busy with the current epidemic, and one is on the road a lot these days. I would expect them to be back sooner or later. In the meantime, we can all make a point of actually posting the things that we think of posting -- they don't necessarily have to be Sherlock related. Just as an example, if you see a person doing something peculiar, you could post it and we could try to figure out why they might have been doing that (which really is Sherlock related, in a way).
There's some truth in that, but that's where new members can really help. As I recall, most of the recent joiners have watched the show recently, so they presumably have questions, comments, etc., which can be posted on the appropriate episode's thread, or in one of the general Sherlock discussion threads, or in a new thread. In fact, there has already been some activity of that sort, such as the recent discussion of Eurus in the "Lying Detective" thread.
And even if some of us aren't quite ready for a rewatch at the moment, any of us could take a peek at some of the older Sherlock-related threads. Surely something will spark a question or a comment that we can post (along with a quote of the original post. of course).