Agree with MrBragg on this one, and that's one of the (many) reasons I prefer Azelor's method to the Artifexian method, even though it's more complex. I would also note that arid climates would generally have a band of humid continental climates (Dfb or the Dw climates) between the taiga (Dfc) rather than transitioning abrubtly. Some of the transitions from desert to tropical woodlands (Am) also seem quite abrupt- there's generally a wider band of semiarid climates (BSh) between the two biomes, with the Sahel being the only exception on Earth- and I expect that's more because of the unique geography of the Sahara and the Congo Basin.