> It's a shame we're losing the biggest internet forum, but it's been on this trajectory for a long time anyway.

But that's what so great about reddit compared to the other big social media platforms: hard delineation by interest groups (subreddits).

Instagram, and any others (AFAIK) do not have anything like this feature. It's all just a jumbled mess of user-to-user connections.

I wouldn't say we're "losing the biggest internet forum" there. They can still make reddit more mainstream without old communities having to change much, right?