Why is Dropbox reinventing itself?

According to DropboxCEO Drew Houston, 80% of the product’s users rely on it, at least partially, for work.
It makes sense, then, that the company is refocusing to try and cement its spot in the workplace; to shed its image as “just” a file storage company (in a time when just about every big company has its own cloud storage offering) and evolve into something more immutably core to daily operations.
Earlier this week, Dropbox announced that the “new Dropbox” would