Peter,
I share much of what you have said here, the Forum is a great reference for all things NSX, the challenge over the past 4 or so years has been the level of activity across all Forum platforms. The addition of Facebook and WhatsApp are there to improve the interactivity and response, that is to say they should suppliment the Forum not replace it. Since 2020 the move away from the NSXCB Forum by THNOC (NSX Owners Club) has accelerated the decline in Forum traffic here, the NSX Owners Club have their own "closed" forum.
Going forward I think the plan is to transfer the current NSXCB Forum to an updated platform and link it with social media/messaging services to provide a comprehensive and open resource for all NSX owners.