Early electric motors were awful, because there was no good way to control their speed. For example, DC motors used in some late-1900s trains still had a giant

Early electric motors were awful, because there was no good way to control their speed. For example, DC motors used in some late-1900s trains still had a giant variable resistor in series with their motor, burning away a huge chunk of the power as heat to force the motor to run at a lower speed during acceleration. AC motors weren't much better. Electric motors only became truly efficient when variable-frequency drive became viable, which was in the 1980s due to semiconductor innovation.