Understand. Internal discussions between us mods and admins, operating a large website with considerable archives and discussions stored has very expensive per month costs.
Over time more and more instrumentalists becoming adults seek social media instead of forums. They do not replace the older generation departing. Plus those older yet not seniors sought social media.
I saw this in model aeroplane and motorcycle forums, too. Stuka Stunt, Brotherhood of the Ring, both about flying control line model aircraft are no more.
About 12 years ago I saw BOTR posts dwindling because regulars left for social media. All the info including plans and historical info were lost. Because the owner did not open the site to SEO, none of its pages are archived, but the beauty was our conversations were all private.
The discussions were of a family nature, all adhered to good posting etiquette, don't get me wrong.
Ditto with Stuka. It was themed by a special competitive sort of semiscale stunt model based on the Stuka dive bomber featured in the model magazines of the time from 1950's on, but discussed many other stunt topics, too.