One could use their money to generate a better rate of return than the rate on the note, which is likely in the 5% range (e.g. use to grow their business, exercise and sell their in-the-money stock options, buy REOs for cash, etc).
If the rate jumps in the future, then it might make sense to reduce or eliminate the debt, versus these other purposes.
The cost of capital is in the 5-6% range for corporations. For small companies/sole proprietors, I doubt one could access this much capital at anywhere near these rates.
