While not directly related to BigDecimal, my employer (Bloomberg) primarily sponsored this effort through the arduous TC39 process and sponsored the implementat

While not directly related to BigDecimal, my employer (Bloomberg) primarily sponsored this effort through the arduous TC39 process and sponsored the implementation in any browser vendor that wanted primarily as a stepping stone to standardising decimal floating point. We see BigInt as a relatively uncontroversial but important extension of the numeric type system of JavaScript. Once the door is open for a type that is not immediately compatible with Number, potentially new numeric types can be introduced. Perhaps BigDecimal (or Rational?) can follow.