[zumu]

If you are implying shops take formerly hot coffee and reuse it as 'cold-brew', you are incorrect.

If you are implying shops repurpose old beans and use them to make cold-brew, then you are correct.

I can't speak for all coffee shops, but for 'specialty' places the above statements are always true.

> Taste wise, it's completely subjective

True, but the taste profiles are objectively different.

Grilled chicken vs roast chicken. Which one is better? Subjective. Do they taste different? Objective.

That being said, I am going to try this aeropressing onto an ice cube method.