Yeah, most digital services keep these things for you, unless you actively delete it,which few people do. Whereas most people will throw out that stupid old paper.
Docker isn't a project manager, I'm struggling to see the comparison. If you have an app (api/web etc) you would use uv to manage dependencies, lock files and a locam virtual environment for development, and then you could install the same dependencies and the project in a docker image also for deployment.
This can't be answered with a simple yes/no without benchmarking this specific use case on specific hardware.
For other use cases I've personally never really found lz4 very useful (neither gzip). Usually zstd on either low/medium can be both faster (or at least, fast enough) and better compressed.