It seems silly to have three nations share an island and not some basic understanding of the need for humans to have freedom of movement. Is there short-term visa-free travel within the Borneo island for Malaysians, Indonesians, and Brunei citizens? This would seem to be a necessity.

Also curious if there was/is a movement to make Borneo an independent nation without any internal borders. It seems this would be a better situation for all the inhabitants. If/when we are back together in the future, it'll be under much more sustainable conditions, wherever that may be.