system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is around 200C/ 400F the right temperature to cook pretty much everything?
gpt
It's a good balance of speed, browning, and not burning.

Virtually all baking relies on some generation of steam, so you need to be far enough above 100C to get that done. 

Then you don't want to wait forever, so you want to go well above 100C. If you want browning you need the food to get up to about 150C, so you want the oven even more than that. 

Above about 250C things start going haywire...paper (like muffin cups) starts to char, things go from browning to burning, and you ruin the outside before the heat can propagate to the middle. 

Without specific constraints, 200C/400F is hot enough to do what you want quickly without ruining anything.