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>Putting transients before long-term behavior leads to urban programming myths and legacy baggage.

Not when the problems still exist. When they stop existing, sure, but the statement generally goes along with how some parts of ES6 are not well optimized yet. Over time, they should be optimized, but I cannot design something for an event that hasn't happened yet and cannot be tested.

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You are doing it wrong.

let is better than var (in every way), so you should never ever use var. Of course you can design for the future. Designing for the future is using let and transpile to a dialect that is used by most browsers today.

>let is better than var (in every way), so you should never ever use var.

Not in the case I presented. let has benefits, but that does not mean its 'better in every way'. Again, dogmatism. Granted, the case I give is many, many iterations, it still is a problem if you're doing image filtering.

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