I am constantly shocked how intelligent technology people frequently fail to make backups.
Backups are so easy today - USB sticks, cloud backup, server backup, etc. Why do so many people ignore this basic step?
You'll never lose money betting on aggregate laziness and lack of foresight.
Seriously, it's so easy. Every time you hit save, you'd have to try to lose the file. Pair this with git going to github or bitbucket and it would take several well placed nuclear explosions to destroy your work.
If my laptop instantaneously combusted at any point in time I would, at maximum, lose approximately 6 seconds of work (or the last time I hit "save"), and could set up a new laptop and be productive on it in about an hour (to install Dropbox and give it time to sync, Sublime, iTerm, Chrome, and custom keyboard hacks). Pet peeves, man.
Switch to GitHub/BitBucket
Dropbox isn't a backup solution, and you're doing two steps when you could just do one - install backup software.
Heck, without git how do I revert changes? How do I stay organised?
Back in Ye Olden Dayes, we trained everybody to back up. It was an important ritual: every once in a while you had to stop whatever you were actually trying to do, spend a bunch of time fucking around with odd, expensive media, and the store the media in complicated ways.
It was a giant pain. Most people didn't do it. But we programmers, wanting people to be as programmable as computers, told them they were doing it wrong, that they had to learn the rituals to pacify the machine gods, who would otherwise destroy their data.
I'm glad they ignored us, because without them we wouldn't have moved toward the correct solution, which is making the computers do the work to solve the problems created by computer use.
We still haven't reached the logical end, which is where every consumer computer is backed up by default on every change. But we'll get there eventually, thereby freeing up people to spend their time on what really matters. Which isn't wasting that intelligence on making backups.