I'm a software engineer, my work is done on work VMs, all my personal projects (coding and music) are done locally and not backed up. I occasionally copy my entire SSD over to a large HDD, but haven't done it for a couple of years.
It's entirely plausible.
You're a software engineer that doesn't use github or even bitbucket to store your personal project code? Not even a googledrive, dropbox, box.net sync services?
3. is incorrect. the leaker wasn't trying to extort, he was trying to sell individual tracks. He then just released the whole thing online, posing as Hoserama, to try and save face. So we have had the leaks for over a week now.
This is a point that a lot of people don't think about. America's gun laws make it a lot easier to attempt suicide, while putting less thought in about the act.
I am British, and have contemplated it numerous times, but the effort involved in driving to a cliff, or creating a noose, or just the worry about doing it wrong, has stopped me.
If it were as simple as (getting drunk and) pulling a trigger, I would no longer be here.