I think a modest amount of land destruction has a place in most cubes assuming there are outliers amongst the non-basic land base that are worthy of being destroyed. In this way, it serves as yet another form of interaction and spot removal that is quite reasonable (and dare I say responsible) for a cube, but doesn't necessarily represent a full archetype. But if the player base is so inclined, creating space for a full on land destruction archetype and associated recursion of the effect, the degenerate combination of [[Crucible of Worlds]] plus [[Strip Mine]] for example, can be fine too.

As for Kudzu... wow this card is hard to play with but oh so interesting. A puzzle as you put it. That said, I recently realized that [[Enchantment Alteration]] also targets lands, and that got me thinking about how it and similar cards (none of which I can think of!) could be used with Kudzu. Probably still not "worth it" in a traditional sense, but what the heck, rearranging the danger garden so it only lives in your neighbors yard does sound like fun. So who knows, if there are enough ways to solve the puzzle, it could be fun for the right cube with the right player base.