Ideas that are too old (too many things have changed since) and ones which won't be implemented for certain reasons or if there are obviously better suggestions.
There is nothing to explain , I had an idea that Rocket Vuel doesnt have a value fuel and maybe it shoud have...
You could use it then in car,train,furnace etc...
In real life, rocket fuel has the same energy value as normal fuel. It is just a bit cleaner, so it doesn't contaminate the rocket engines.
If we did this in Factorio, you would have a fuel that costs 10 times as much as solid fuel and performs the same. No one would use such an expensive fuel.