Nice! We have a 10/1 ARM, but are still 5.5 years away from entering the adjustment period. Just realized you almost never hear about people being in that situation, at least around here, it's mostly just the horror stories during the Great Recession, and then people who use ARMs and then refinance before it adjusts, which makes sense given the trend towards falling rates since 2009. Of course, it was only like 6 years ago that I discovered MMM, and our financial picture has changed so positively since then, so it's a little hard to imagine what it'll be like for us in 5.5 years, but I'm guessing we'll have enough abundance to just pay it off completely if the adjustment and/or refinance options are both prohibitively expensive, which means it will be truly just an optimization problem, and not an actual true financial problem that we'll be dealing with then.