Exfiltrating is insanely more difficult especially of "the useful stuff" - and even then you have to sell it or use it to embarrass your target, it's pretty difficult unless you target people ahead of time - easier to just interrupt business.
All my data is in Dropbox, with a few helper bash scripts that I run from time to time to sync a couple choice filters. Otherwise, I interact with it on the website. Ransomware would have to be extremely targeted just to me to cause any issues. Security by obscurity. :D
If ransomware was able to infect the machine, then I doubt the data was safe either