I think people assume oxidization is a negative flavor, and then they have an 18 month old RIS and think, this tastes great, clearly it isn't oxidized, it even developed this really interesting sweet sherry-like flavor.How can you be so SURE? I've left beers in Buckets for that long, and they tasted perfectly fine. Don't assume what you hear about "oxygen permeabilty" is going to be a given.....People believed autolysis was a give too, that if you didn't move your beer after a week you might have well just dump it.
One thing I've learned in this hobby, not to make generalizations, our beers are pretty resilient creatures, and I don't believe focussing on a worst case scenario with certainty is giving good advice.
But maybe it won't have it, who knows. Taste it to find out.