Yea, I usually keep a simple incremental ID or whatever is default for internal IDs, and a separate external ID for entities that are presented externally. For security and not unnecessarily leaking info about the number of records, time and rate of record creation etc. UUIDv4 is convenient for uniqueness, but impractical if the ID needs to be conveyed over phone or written down – or used in URLs, so I often use some system for slugs or short codes in addition to the UUID.