Caught him mention this here, decided to look up the project.
Seems neat. There's a few different routes that have been proposed over the years, changing with the political conditions I guess? Train gang will be fans of it.
For Bolivia I think the obvious merit is that it provides much more port access options for a landlocked country which is probably essential for maintaining their sovereignty.
not really it is not easy but it is possible, like brazil, argentina and uruguay have a lot integration on their eletrical system for example, if you want to read about it this is from UFRJ which is like the second biggest university in brazil, it is not that hard to imagine this could be done as this would be in the interest of mercosul, it is hard, but like lula would want this, brazil biggest trade partner is china, and like just seeing how he is on the ukraine thing it feels like he wants to do some diplomatic deals, so could happen would love to go on a train trip through the andes that would be the coolest shit so i am hopeful