But if you're not careful, the delta between the compressed version and the original could be bigger than the savings from the compression. In my armchair spec

But if you're not careful, the delta between the compressed version and the original could be bigger than the savings from the compression. In my armchair speculation for the case of severe lossy text compression, the delta/diff could easily get there, making a strong compression algo based on something like GPT-3 not really practical for doing lossless.