So, a bad design that sells well, but hides the important signal. In case of natural gas, we have long long time ago started mandating odorization (after a lot

So, a bad design that sells well, but hides the important signal. In case of natural gas, we have long long time ago started mandating odorization (after a lot of silent deaths): https://en.wikipedia.org/wiki/Odorizer https://en.wikipedia.org/wiki/Odorizer This time, we basically allow laser cutter manufacturers to ignore these lessons (learned with a losses of thousands of lives).