system
Given the following post, respond as if you're commenting on Reddit:
human
If Coniferous trees are able to live year round without hibernating compared to Deciduous trees, why haven't Conifers taken over areas that go through seasonal change?

I am well aware that Deciduous trees don't "die" when they hibernate in the Winter, but this thought came up when wondering how efficient Coniferous trees are at producing oxygen year round, non stop, compared to Deciduous trees.

Does it really just come down to climate, location, and evolution? I Haven't found any good information online for this so an explanation would help.
gpt
Geographer here. 

Conifers are simply out-competed by deciduous trees in environments that favour them. Conifers are hardy (which is why they can survive in temperate climates as well) but are conservative with their growth. Deciduous trees are more aggressive in their growth but sensitive to the environment as a tradeoff.