Why don't you find out by getting a rough estimate of the average age of your credit history. Start with credit karma. Then check you your credit files with Experian and Equfax and see if you can get similar ages of all open accounts. If your age is decent (over 8 years) then you risk more as you open more lines that will dramatically lower that average age. If you average age is only 3 years, it will be much less of a factor.