It's not completely impossible that this guy knows something about Kodak's (and the UK Kodak Pension Plan's -- soon to be the entity that markets Kodak-branded film) plans to not cut and package any more 8x10 TMY-2, which has been a special order item for some time. However, his nonsense about dichroic fog after the film is a mere one year old in his so-called "extreme processing methods" certainly diminishes his credibility in my eyes.
I'm not one who normally sees the future of Kodak film through rose-colored glasses. Nonetheless, I suspect that, since 4x5 TMY-2 is cut from the same master roll as 8x10, we'll continue to see special order availability at least through 2015, at which time the long-term supply agreements for motion picture film expire. That's when I would begin to worry about any Kodak films, in any size, that I wanted to purchase. At this point, the linked item reads like fiction intended to motivate donations. Note too the very specific wording (emphasis added) of this excerpt:
"Recently, he received a share of the last regular production run of the particular brand and size of Kodak film he uses to create these images."
There have been no regular production runs of 8x10 TMY-2 since it was converted to a special order item several years ago. This signifies nothing negative about the availability and freshness of that product bought today from B&H, which places its own minimum quantity special orders, or through K.B. Canham group purchases.