When using `bash-completion` with `debusine-client`, it actually runs `debusine --help` to gather possible subcommands. The client helpfully prints all possible commands including the deprecated ones. It would be helpful for retraining the finger memory if completion only provided non-deprecated subcommands. This effectively translates to `--help` displaying only non-deprecated subcommands. There is a downside as well. If a user encounters a deprecated invocation and tries to understand it using `--help`, they no longer can. I suggest that at this phase of development, accelerating deprecations is more beneficial still.