[zbentley]

Because I switch computers (often, for work), and what's muscle memory on one then becomes "command not found" on others without the alias. Many of those computers I don't control and can't say "well, everyone should just run my aliases".

Because I have to share commands with other people who are troubleshooting their own systems, and copy/paste from history becomes useless if I have specific aliases.

Because someday I or someone will want to script these interactions, and aliases are not available in subprocesses.