Comment by babbledabbler

Mainly portability of data and options for the future. I'm all on one postgres instance right now and don't plan on breaking it up until necessary. If at some point I need to take a table and move it to another type of database I want that migration process to be straightforward. If I have integer keys with sequencing behavior I anticipate having to do that porting. That internal key would then become external to do the lookup and if it's an external key I want it to be UUID for security as well. Integers as IDs are guessable so I want to keep them internal.