...... So steam power works now? Technology just jumped from late-18th century to mid-19th century level.
Where are the steam ships? Where are the steam tractors? Where are the factories? Steam power still existing allows for everything from mass production to airships to rudimentary tanks.
You've got steam wagons, steam rockets, steam tanks, steam cannons, steam ships, steam tractors. This whole world just went steampunk. How the hell did the world just collapse when steam power still works? We had a country that stretched from sea to bloody sea even before the telegraph!
Maybe this means that countries like the United Kingdom stayed relatively intact, isolated from the outside world, small area, still heavily uses steam engines.