I am no media expert, but personally, I think the forum and Social Media platforms (FB, IG, ...) fulfil different objectives.
Personally, I look to the forum for help and advice as well as club news and updates. The forum is great as a place for dialogue, debate or a place to ask for help and advice. I would hate to see forum usage diminish (as it did for the 997) with other online forums (I wont name them) becoming the go to place to obtain owner information, help and assistance. I strongly believe the forum should be the go to place/repository for sharing technical information (help, assistance, tips, advice) and official business of the club. The forum is not a social media platform; it is not targeted at sharing of media.
I do not think any social media platform could replace the forum for the above purposes as they lack the means to publish/share documents; engage in conversational exchange etc.
However, I can also see a place for IG and/or FB. I am not a big IG user but some of the younger members of my family are so I have the app on my phone. I see IG as a picture "broadcast" platform; I post pictures in order to broadcast them to my followers (let's not get into a debate of why people want to do this!). FB is similar and seems, nowadays, to retain an older demographic. Neither is a platform for debate, engaging a group dialogue, seeking/obtaining technical help, publishing documents etc. and neither could replace the forum for those purposes.
However, what these social media platforms do offer is the means, for those that want to, to share pics of their car in nice locations etc. They are far more geared toward that kind of social sharing and social interaction which, in my view, the forum is not suited for.
I am a member of two regional FB groups (SW and Essex) which, particularly in the case of the SW group, find it is informative in terms of events and its fun to see member's car photos, etc. Usage of these two groups is completely different and inconsistent (not a criticism) and I suspect is reflective of the nature of the members of those regions and how they prefer to interact with one another. I also follow the PCGB IG account but never really look at the posts.
Returning to the 992 IG account. I am not really sure what role this would actually fulfil. Whereas FB has groups, allowing members to post/share pictures and news and enables social interaction via the group; I am not sure that IG has this functionality? If that is the case, and I am happy to be educated otherwise, it would appear that the IG account would be used by the admin to broadcast output rather than IG provide a means for any form of social engagement?