Every Chromebook has a death clock, and most schools do not look at it until it goes off. It is called the auto update expiration date, the AUE, and it is the date after which Google stops giving that device security and feature updates. The hardware still turns on. It just stops being safe to use and slowly stops working with the tools you depend on.
The problem is that AUE is quiet. A device does not break on its expiration date. It keeps running, so it is easy to ignore, right up until you have a few hundred machines that are out of support all at once and a security posture you cannot defend. Then it is an emergency instead of a plan.
Edventory tracks end of life dates as part of each device's record, and feeds them into the forecast. That turns the quiet death clock into something you can actually see and plan around. You can look ahead and know that a batch of devices ages out next year, which means that is a replacement you budget for now, not a surprise you scramble to cover later. It moves AUE from a thing that ambushes you into a line in your plan.
This is the whole philosophy of lifecycle management in one example. The information exists. Google publishes the AUE. The failure is not knowing it, it is not having it in front of you at the moment you make decisions. Put the expiration dates where you do your planning, and a fleet aging out becomes a budget you saw coming.