Would like to toss this question out there and give my take on it, as the topic was touched on slightly in the latest SMIP podcast and on Rich's stream at some point recently...
Since the main taxing deck in Vintage has transformed by and large into an aggro deck, what colors and types of cards is Wizards developing the prison strategy for current and future printings, and is there a decent place for prison in Vintage after all the restrictions (Thorn, Chalice, LSG)?
I have been thinking about this for a month or so and have been slowly building my vintage collection back on MTGO. My project deck last year was W Hatebears, and due to Mentor running amok it was just overpowered and outnumbered constantly, and decks were over-prepared to deal with any creature, especially white creatures. Without Mentor obliterating the meta and Shops largely shying away from Prison/Taxing due to restrictions, I think the correctly configured Hatebears deck has a chance to fit into this particular hole in the metagame.
I've been experimenting with a total of 9 (3x Thalia1.0, 4x Glowrider, 2x Wingmare) Thorns on legs, among a lot of other hateful terrible cards, and 9 seems like a lot, but honestly it's where this deck starts to get competitive. I have 3 more things to pick up and a few more to try, and I'll take it to a league and do a write-up after the list gets solidified. There's some kooky shit in there.
I think some combination of 2- or 3-color hatebears has the capability of filling in the void left by the restriction of Thorn, but the decks aren't quite there yet.
Any thoughts on the future of taxing/prison decks?