Dunno about everyone else, Ken, but Pam and I worry about Lee and Margot's health situation - he's been off the air for a long time now. One option for resurrecting the MB activity is to acknowledge technological progress and use something that's very, very simple for everyone to access like a facebook group or page. But let's see if Lee can return and continue to rebuild the GB before we start talking about changing the MB.
I'm no expert, but seems to me that life has moved on for most people and many of the former MB users (including myself) are now either on facebook or away from social media altogether. I used to despise facebook until I started using it during the Covid lockdowns and realised it's all about the admins and moderators keeping a close eye on things to prevent the nutters out there from taking over our minds (a bit like left and right-wing politics!).