Facebook has largely replaced my involvement on the forums as well, but primarily because it's much easier to participate in the local Supra community there.
I tried and tried to gather up Minnesota Supra owners on the forums here for ages, but with very little luck. I start a Minnesota Supra group on Facebook - and we've got 40+ members (a LOT for a place like MN), and lots of activity. I still refer here for some things, but even the knowledge stored on the forums is starting to get stale.
MKIII Supras are certainly on a "downward spiral" of sorts, and that's to be expected as these cars reach the age they are. Particularly 7M cars - there is basically no such thing as an original un-rebuilt 7M-GTE anymore. They've all been used and abused and reached the point of basically not being worth rebuilding by someone who isn't "in" to Supras. Once these cars make it to "less experienced" owners, a lot of corners are cut, and the cars don't last much longer. Because of the state of most 7Ms, aftermarket parts are now virtually non-existent. JZ parts are still produced and readily available, which keeps the "swapped" cars up and running, but even those can't stay around forever.
Maybe it's time for me to move on to a newer car...