It tells you a lot about foreign/trade relations but for people who can move around/work or be able to claim ancestry for passports it might be a nifty guide to keep in mind. I know a Latvian who was living in Ireland, and applied for Irish citizenship solely for easier travel (which also required renouncing their latvian citizenship). In Europe it's not hard to find people with multiple ancestries (i.e. born in one country, with parents from two different parts of the world) and for them it's also a good guide to see if it's worth applying for citizenship if they want the access that the passport gives them.