A lot of people have said that one problem is that certain old FOG members aren't posting anymore -- and that the solution is to get them to rejoin. With all due respect to those guys, it's a big world. It might be more fruitful to focus on bringing new people into the fold than bringing old users back in.
Amen...times change...people change, just because you're a motor head does that mean you need to continue to be a motor head until the day you die?
Cars, metalworking, guns, motorcycles, runners, woodworkers, bicyclers, surfers, watches, golfers...well you get the idea, these are all just areas of interest that lucky for us, we can enjoy and experience and when we've tasted enough, sometimes we switch to sample a different interest. It doesn't mean we're not still interested in the hobby, it just means we've expanded our options and maybe we no longer feel the compunction to post on the FOG.
Embrace the fact and be thankful that these "old" posters took the time and effort to post their experiences, but also embrace change and that the baton needs to be handed to the next one in-line rather than the oldest one in-line.
A very happy & safe New Year to all...