FS deduplication solves the problem at the storage level, but not at the transfer level. The components would still be downloaded multiple times if the download

FS deduplication solves the problem at the storage level, but not at the transfer level. The components would still be downloaded multiple times if the downloader doesn't have a way to know what has already been downloaded. Docker's way of doing things is basically an admittance of defeat by lazy engineers. We can do better than that.