The number of extremely negative comments here here about using a second process [just like Chrome, Creative Cloud and countless others] to auto-update is really surprising. I can understand people not being thrilled with a kernel extension being installed, but most of those comments there seem misguided or uninformed.
The obvious transition point [to me, it seems] was when they put Condi on the board. HN opinion on nearly everything Dropbox does has really soured since then.