Actually, not really. In this case UserId is still an integer, which means any method that takes an integer can also take a UserId. Which means your co-workers

Actually, not really. In this case UserId is still an integer, which means any method that takes an integer can also take a UserId. Which means your co-workers are likely to just use integer out of habit. Also, you can still do integer things with them, such as > nonsense = UserId(1) + UserId(2)