those who don't read articles are doomed to what?
Pastorianus is a hybrid. Some of its genes are known to come from cerevisiae, some from an unknown parent. Eubayanus is an exceedingly close match with those genes of unknown source.
Patagonian natives used the galls containing eubayanus to make a kind of beer.
Eubayanus already seems to enjoy a widespread and will established niche in the patagonian ecosystem.
It has been carefully studied by people who actually know about yeasts and genetics. Admittedly, they aren't Omnicapable Internet Forum Dwellers, but you know, I think they might know their stuff.
None of these things point to it being a recent invasive species.