So I will use let to signal the fact that the variable is subject to change. const and let should lend more meaning to your variables, and should not hide the truth in any way.
Breathing air into AirBnB’s JavaScript Style Guide
Alex Moldovan

That is, IMHO, due to a misunderstanding of how const & let work. If you want to declare a universal constant value, I’d use capital letters (e.g., PI).

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