Because the register is a spreadsheet updated when somebody remembers. Devices are issued in a hurry, returned informally, and reassigned without a record.
An asset is a tracked item issued to a person or location, with its history of allocation, condition and return.
Assets sit on the same person record Nest holds. Issue, return and condition are recorded as events, so the register is a consequence of what happened rather than a document to maintain.
Somebody leaves with a laptop and a phone out. Offboarding in Nest shows both, so return is a task with an owner rather than a discovery six months later.
It will not discover assets on your network. What is in the register is what was recorded when it was issued.
Nest's personnel record, onboarding and offboarding, incidents that reference the asset, and change records that affect it.
Yes, with seat counts and renewal dates.
Yes, which usually shortens the diagnosis.
Yes, including who held it and when.
Fourteen days, every module, no card. Or half an hour with someone who will run it on your own records and tell you where it does not help.