Good old 4 pound hammer, a long 16 inch by 1.5 inch wide cold chisel with hand guard, and a good arm is all that's needed.
I don't understand why people are so lazy. Fearful of a little hard work.
All the mechanical ways can be faster. However, they are much louder, require $$ investment, ect.
"Don't argue with stupid people. They will just drag you down to their level, and beat you up with experience."
Patently waiting for the apocalypses to level the playing field in this physiological game of life commonly known as Civilization