The end of @babel/polyfill: The more efficient alternative?

However, there was an alarming caveat with this recommended solution: a significantly increased bundle size.

module: {  rules: [    {      test: /\.js$/,      loader: 'babel-loader',      exclude: /node_modules/    }
]
}
["@babel/preset-env", {   "useBuiltIns": "usage",   "corejs": 3.6}]
import 'core-js';import 'regenerator-runtime/runtime';

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