Burner inserters and machines run faster if their fuel has an acceleration bonus.
Mods introducing new content into the game.
Furnaces, assembling machines, production chains.
I can't think of any reason to use Burner items tbh
AAI Industries (i think) expands burner phase
TIL some people are stuck in the dark ages lol
This gives a reason to use them. Also why not, it doesnt hurt