I'll keep this short. There is mostly silence on this from the pen-holders at TC39, but if you think this is a good idea, maybe repeat it.
The number of ES modules out in the wild measure in the thousands (as opposed to kajillions of non-ES modules and non-modules), and are generally authored by experts. If you're in TC39, and ES modules are your compatibility target, you're gonna have a good time adding language features (and dropping crufty ones).
ES modules are different from simulated modules provided by Webpack. If devs need the Old Ways, they can still use module architecture provided by our industry's nigh-ubiquitous tooling.
ES modules are different from CJS-based modules in Node. If devs need the Old Ways in Node, they can use CJS-based modules in that environment.