I remember in a video, Linus measured that the ground absorbs all the heat before it could even reaching the pool.

His pipes have too much or not enough insulation then.

I don't know anything about the topic and this made me really curious. Why could too much insulation be a problem?

It then just acts like the ground does and just absorbs the heat instead.

This would be a really cool idea for municipal swimming pools or large residential developments. It blows my mind that people pay to heat up all these data centers and then pay again to get rid of the heat. Data centers could rent space by paying in kWh of heat.

I would set something like this up in my house if there was some kind of decentralized processing company I could register with.