Thanks Joe:

What is file vault doing for you in a sentence or two? (as I know you went years without it). What is the main upside? Any annoying downsides?

But I have the note app on the laptop, and if the laptop gets lost, icloud.com, it's right there. Just test, and it unlocked fine on icloud.com

I don't know why, but any minor thing and boom: Apple makes me change my password. (every year on average) I just add a new letter before the long pass each time- so I'm on c... password. Like you I'm forced to changed credit card numbers every year or two.