ryzokuken 🇬🇷 sffc I've been thinking about Temporal, and would like to be more specific about the relationship between ECMA-262 and ECMA-402 in general. What are your feelings on proposing something formal like the following at the upcoming plenary?

1. Any behavior specified in ECMA-402 (including circumstances that require throwing an exception) must be valid in an ECMA-262 implementation that does not support ECMA-402, allowing any ECMA-262 implementation to adopt it incrementally.
2. ECMA-402 must not prohibit any behavior that is specified in ECMA-262 as available to implementations other than introduction of new built-in values and use of reserved function parameters, allowing any ECMA-262 implementation to adopt it without introducing backwards incompatibility.