That would be a glitch-required speedrun, cuz there's some bug to duplicate coords but it costs too much time to walk to the border

Sounds awful. generating that many chucnks would lag the game considerably, plus the game just lets laggy the larger the coordinates get.

I gave it a shot today, ended with a time of 11:54.

Ok it seems boring. Just get obsidian, enderpearl, and dup a lot