Both the 2040 and the Pi5 south bridge are in-house custom silicon, and fairly good at that. I think the parent post is alluding to the Pi foundation eventually

Both the 2040 and the Pi5 south bridge are in-house custom silicon, and fairly good at that. I think the parent post is alluding to the Pi foundation eventually building their own processors, and in the process hopefully shrugging off many of the pi’s longstanding limitations.