Almost 1 of 5 American and Brittish soldier KIA in WW2 died in while involved in the Strategic Bombing campain against Germany.
Some numbers:
Aluminium tanks.
Zimmer doesn't matter how many war machines were produced if they can't get to where they are needed due to lack of fuel and a destroyed transportation system.
Dont mix strategic bombing with tacital. German fuel shortages was an effect of not having enough production capacity ie no oil field, atleast not after they lost control of them in Romania. For front line units it was hard to get fuel and supllies because of the air superiority but that is not what we are discussing. Hampering the enemy with tacital bombing is very effective. The German tanks reached the front line but their fighting were greatly affected by Allied air superiority over the battle area.
Edit: The bombing campain did a lot of damage to Germany, But since it wasnt untill spring 1944 the campain really picked up pace it was already too late, Germany was already on the retreat and would have lost anyway. The damage done from late -44 to the end had no effect on the outcome.
My point is that concidering the amount of personell and resourced used in the strategic bombing campain the result is a disapointment.