I would say barrels; there isn't much point in installing the extra machinery and infrastructure to facilitate the transport of barrels. Refined hazard concrete is a good candidate for impracticality as well. Then there's burner inserters: they're not quite useless but it is very easy to skip direct...

I might be a dedicated player, but I am far too casual to even imagine what those speedrunners are doing.

Each time I learn something new, I start over. I've started over more times than any of my friends who play Factorio (which, admittedly, is only two), and more times than I can count. I try to build as organized a factory as possible, organizing the bulk of my belts into a main bus with other produc...