The key to ongoing development of a fully functional and reliable system is limiting your options to those changes that improve its efficiency only, but within both the scope of its function and the service it provides while not straying beyond the limits of its original purpose.
No system can exist without its purpose, and purpose cannot exist except by a first purpose prior to all systems, by which the first system, purposed as universal and thus the criteria for system integrity, makes possible all systems – even those that contradict it.
If this is not true, then I ask; what is the function of a purposeless system? According to what plan does that system work, and what service does it provide? How does it begin? Upon what nucleus does it grow, and toward what end? What are its limits, and who or what placed them? What governs it – for no system is self-maintaining?
A system is the synchronous interaction of multiple components, which, altogether, form a collective whole and operate toward one unified purpose. The weakest point of any system is therefore a single component operating against the purpose of the whole. By purpose alone a system begins, without which nothing exists or can.
Summarily then, a system is both purposed and then designed according to function and operational efficiency. Thereby a system is not accidental; and upon violation of its purpose, hence also design, no system can stand for long, including you and me.