What's the best tech invention of the 21st Century ?

Question

This question enable to reveal the best thing that has ever been invented in the 21st Century. 

Answer 1

During this Fourth Industrial Revolution, electricity is the best invention for me. Without it, then other modern devices or gadgets cannot be functional.

Answer 2

Although it was first invented in the 20th century, the quantum computer is still in the early stages of commercial availability.

While a standard computer handles digital bits of 0s and 1s, quantum computers use quantum bits or qubits, which can take any value between 0 and 1. And if you entangle the qubits, you can solve problems that classical computers cannot. A future quantum computer could, for example, crack any of today’s common security systems – such as 128-bit AES encryption – in seconds. Even the best supercomputer today would take millions of years to do the same job. PhysicsWorld - Nov 13, 2020

Answer 3

It's subjective, but some top contenders could be smartphones, social media, artificial intelligence, electric cars, and renewable energy tech.

Answer 4

The best tech invention of the 21st Century is hard to pinpoint, as there have been many innovative and revolutionary inventions over the past two decades. Some of the most notable inventions include the smartphone, artificial intelligence, 3D printing, and self driving cars. These inventions have had a profound impact on the way we live and work, and have revolutionized many aspects of our lives.