One downside of perfectly bespoke tools: they rot away.

All software rots away as the surrounding context changes.

Tools that are made by someone else for a large market of users tend to be maintained and keep working, because they are constantly in use by someone.

But a tool that was distilled on demand just for you and that you haven't used for a year or two might have rotted while you aren't using it.

Ideally these tools can be "alive," maintaining themselves, instead of passing that maintenance burden onto the user.