That is also true, but I was referring to, for a given monthly payment, the ratio of that payment that goes to interest vs principle. As a fraction, the lower the interest rate, the more of every payment goes to principle. For the very high 10% and above rates, principle might only be 20 bucks a month vs 980 paid to interest. For the very low interest rates, nearly 50% might go to principle and 50% to interest. For all cases, payment 360, the last one, will be mostly principle. So maybe it’s $980 principle and $20 interest.

This dynamic significantly affects loans that are not kept to maturity.