[lxe]

From what I understand: instead of cp -rf from offline cache, or ln -sf (which doesn't work for a large percentage of packages due to node being node), they propose to use a custom resolver to tap into the cache directly.

This will also break for various packages due to fs.readFile* dependencies, gyp, and other things. If your dependency tree is 4k+ node modules, the "vanilla" yarn or npm resolution and reconciliation techniques are already so brittle, that changing them will undoubtedly break things.