I have a set of stripes pipes powered by redstone engines, and though they seem to require energy to begin working, they seem to never actually consume this power and will work forever on even a single stroke from the engines. Reloading the world seems to reset them and make them realize they are unpowered if they are so.

Also, they seem to break all blocks instantaneously, and I heard this isn't supposed to be the case anymore? Or has that not been implemented yet?