I do agree that every deck should have some kind of solution for the threats it is likely to encounter, and that includes problem lands. Honestly, I'm glad both options exist (land or cantrip)! Especially with an interaction like land destruction, I think it's great that we can tailor our level of response from the recoverable options like
Lithoform Blight and
Spreading Seas, through the fairer trades like
Strip Mine and
Cleansing Wildfire, up to the nuclear options like
Armageddon. As the OP suggested, land destruction can be a touchy subject, so having the range gives us the option to slip some into our own metas without going all out.
For me, the idea of the "best" targeted land destruction has to account for the synergies of the deck. I just picked up a
Lithoform Blight for my Pharika enchantress deck, but I like the versatility of
Cleansing Wildfire for my 4-colour Omnath landfall. If the deck doesn't suggest any obvious synergies I'll slot in a
Wasteland or
Ghost Quarter, or even an
Encroaching Wastes just to have the option in there, but I usually feel like the lands are the less flavourful options. I really could be convinced otherwise, but I don't think there is any way to say which is the best use of the slot without evaluating the other payoffs the deck has built in. Some decks can afford a colourless land, and others already filled those slots with their strategy; some actively favour the use of certain card types, and some are especially resilient to certain kinds of setbacks.
Was there a consensus, though, that the "destroy target permanent" cards like
Beast Within are the actual way to go in terms of power and versatility? Because it seems like they are never dead and have none of the drawbacks of the others. Is sounds like the debate between lands and cantrips is really about whether or not they turn out to be a dead card.
Wasteland has a low risk of inclusion if it's dead, but a fairly steep payment price to use (losing a land kinda sucks even if it's a smart trade). On the other hand,
Cleansing Wildfire in your hand feels bad if there's nothing good to hit, but can replace itself while turning that
Gaea's Cradle in to a
forest.
For the record, my preferred land destruction is
Rain of Thorns, and I can confirm that is probably not what you should run lol