Earlier quoted context omitted.
This iBook is running OS X 10.4.11 … No, it definitely is not supported and hasn't received updates in years. I wouldn't try to use it as a daily driver for general usage unless I installed a new OS like FreeBSD or OpenBSD on it.
And so you're a great target for a malicious actor since you no longer receive security updates. I guess you just proved my point.
You understand anyone, anywhere is great target for a malicious actor, right? Unless every single piece of software on every piece of hardware on their network is fully patched and up to date, and doesn't contain any zero-day vulnerabilities, of course.
What point do you think I apparently helped prove? Are you referring to software entropy? The Wikipedia article you adjacently linked suggests that software bugs will only increase with every change, unless specifically mitigated - "as a system is modified, its disorder, or entropy, tends to increase".