A previous dev has recommended that the GTA 6 map really should be smaller and even more densely packed. Even so, as leaks have ongoing to trickle away from Rockstar, modders have recreated the GTA six map in GTA five's engine which offers a sense of its enormous scale. https://gta-six-preorder75307.articlesblogger.com/57803421/about-grand-theft-auto-6-trailer-2