It will affect your credit in the following ways.

1. It will shorten your average credit history in the long run.

2. It will affect your average credit limit (might be positive or negative)

3. It will add ONE to your total accounts as long as it counts.

4. It does not feel good when something you don't have appear in your report, at least for me.

All these effects are very minor and you don't really need to care about it.