Use of hydrogen over Russian Gas in Germany

Since the start of the war Germany has reduced its dependence on Russian oil from 35% to 12% and on Russian gas from 55% to 35%. Hydrogen can store vast amounts of energy, replace natural gas in industrial processes, and power fuel cells in trucks, trainsGreen hydrogen is produced by using electricity from renewable power to split water into hydrogen and oxygen molecules using an electrolyser. But those machines and the electricity to run them remain costly., ships or planes that emit nothing but vapour of drinkable water. Do you think that Germany will soon fully replace Russian oil ?