Why would you ever want to pay off your mortgage? Mortgages are the best and cheapest way to get debt. Considering the rate environment, the rate risk isn’t a big deal, IMO. Hell, I would even go a step further: dump that 200k into a levered S&P 500 (2x should be good). Unless the world falls apart, you’ll definitely be a millionaire in 10 years. And if you do 3x, maybe even 5 years (that’s some more risk though).
I can’t really imagine a world in which the annualized yield of SPY over 10 years is less than 2.7%. And like I said before, rates are only going down and that’s not going to change anytime soon. Of course a financial advisor wouldn’t tell you to do it but they don’t really care about you in the first place.