I wonder what it would have been like if, rather than bombs, the B-17’s and B-24’s had simply dropped tons and tons of these things. Talk about “carpet” bombing. It would bring it to a whole new level. Only underground stuff would be spared, or lower floors of multi story buildings. Maybe the last planes in the raids could have the actual bombs.
Well, take the Dresden firebombing during WWII.
It came in three waves.
First the spotter planes dropping flares, then bombing with HE to create “kindling” and open up roofs, then the incendiaries.