Ancestor comment is probably daydreaming about being in a Kardashev 2 civilization with a full Dyson Swarm collecting 100% of the Sun's total energy output, in all directions.

Some estimate we're currently only at Kardashev 0.8, harnessing about 80% of what energy from the Sun hits the Earth, while others argue that this percentage is much lower.

Ideas are easy, implementation is hard.

Edit for clarity.

>Some estimate we're currently only at Kardashev 0.8, harnessing about 80% of what energy from the Sun hits the Earth.

80% seems super high, unless by 'harnessing' you also mean things like 'the sun energy warms up the ocean allowing fish to live which we then consume for some% of the energy that sun sent'.

I'd be pretty surprised if efficiently used energy / energy hitting the earth from the sun was >20%.

We aren't in the same universe as 80% of the Sun's energy that hits Earth being used.

The numbers I'm seeing are 174 petawatts hits Earth and the world uses 18 terawatts of energy.