Thanks for the encouragement, everyone. I think there are many people in this cohort who will drop out early. Great progress all around.
Honestly, our biggest challenge is figuring out what we want our FIRE life to look like and what level of comfort we need to pull the trigger. My husband is a lot more conservative in his assumptions than I am. He's also a lot more attached to our current home and current lifestyle than I am. There's no right or wrong here--it's just an issue of what do we need, both materially and psychologically, to step away from the security of the careers we've built.
This has also forced me to do some careful thinking about what I actually WANT--for myself, for my family, for my community (however it's defined). A little embarrassed to say, I didn't really think about what I WANTED when I embarked on my career. Mostly, I wanted to have a job! Then, as I got a little more established, I wanted a job I didn't hate that let me have a life.
Well, I've got that now. So what else? That's the big question.