It's been done before. How many people who were active on brony fandom or out doing their own thing these days? The herd thins out as the time passes. At the end of the day everyone should focus on what makes them happy whether it means staying in MLP fandom or leaving. It is a bit sad - I got in when the fandom was definetely more active than it is nowadays - but hey, if people want to pursue other interest? I'm sure you will find something else too, or perhaps already do have something on the horizon. Moving on is all natural