I remember Buenos Aires to Porto Alegre (via Foz do Iguaçu) by bus. I guess that's about 1/4 or 1/3 as far, with somewhat less dramatic landscapes. Extremely comfortable except for the violent action movies shown on an overhead TV with sound, even for part of the night.
Edit: but ultimately probably a very different experience because it's so much less mountainous!
Latin American noise tolerance is something else, the local passengers probably found falling asleep to the sound of gunfire and shouting from the film soothing
That’s basically just a bus up the coast of Uruguay and a bit of Rio Grande do Sul? I did the same route in the opposite direction, via Tacuarembo, mostly on horseback. Extremely uncomfortable, but an interesting week nonetheless.
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