They have even hosted some PTQs
However, in its original wording, it made a 4/4 flying token when it went to the graveyard from anywhere
(2024-11-08) "Flashback [cost]" means "You may cast this card from your graveyard by paying [cost] rather than paying its mana cost" and "If the flashback cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack." (2024-11-08) You must still follow any timing restrictions and permissions, including those based on the card's type
Most white token decks will love this as more redundancy, and for enabling some wild plays that the other five/six mana options just cant
Id expect most Cubes to opt for the Vinestalk, and I cant fault anybody for being on either side of that one
Still, Id say this is a meta call or something you might want in a specific deck or theme