Your Favorite Less Obvious OP Parts of Mods

So sometimes mods have parts that are really overpowered, and a lot of times this comes in the form of flashy, obvious stuff, weapons and armor that are several times the vanilla power level, or bionics or psycasts that turn enemies inside out.

What I'm more interested in is the less obvious and more easily overlooked things that are just kind of overtuned to the point where things get silly.

For instance DMS Assemblymaster is certainly a mod that adds absurd, cobbled together frankenmechs that have much more firepower than even base DMS, but the humble Alphanoctula is potentially the most absurd. Unlocked with the same research that gets you the Automatroid assembler and costing only steel and components, it is a mech that can do basic, firefighting, hauling, cleaning, plant cutting and planting at level 10 with no work speed penalties (essentially making it as efficient as like 4 agrihands or cleansweepers) while moving at speed 11, while also still being able to equip a weapon, and all for a single bandwidth. Sure it isn't going to be a raid soloing monster, but even one will replace a bunch of other mechs, and a swarm will revolutionize your colony's workload.

Or how about Wolfein race? Sure they've got plenty of flashy mechs and weapons, but I'm more interested in their flooring. Both the tile and the carpet are absurd, being cheap to make (3 steel or 2 steel and one cloth), only taking slightly longer to build than concrete, as pretty or more so than regular carpet, non-flammable, quicker than average to clean and near or at double the cleanliness of sterile tile.

What sorts of silly, easily overlooked and overcooked bits of mods have you found?