Most subnet articles start from a blank piece of paper and end with a clean diagram. That is not the situation most teams are actually in. The situation is a Confluence page from 2019, a router config someone exported last quarter, and a network engineer who swears "the 10.
Source: [Dev.to](https://dev.to/lizely/auditing-an-existing-subnet-plan-before-a-cloud-migration-2f6g)