Those... are not mutually exclusive as killer upgrade. No longer having to use a nonsense CJS syntax is absolutely also a huge deal. Web parity was "always" go

Those... are not mutually exclusive as killer upgrade. No longer having to use a nonsense CJS syntax is absolutely also a huge deal. Web parity was "always" going to happen, but the refusal to add ESM support, and then when they finally did, the refusal to have a transition plan for making ESM the default, and CJS the fallback, has been absolutely grating for the last many years.