[dragonwriter]

> With the files API, apps could actually replicate the microsoft word experience of drafting a file and saving it to your desktop and praying that your hard drive doesn't fail,

Even withou the files API, with local storage, web apps can (and some—mostly extremely casual games that are free—do!) duplicate that experience with the extra risk of your data being lost because your disk became too full or some other event causing the local storage to be cleared.

[LoganDark]

I once ran out of disk space while Chrome was running and, despite me clearing the space again shortly after, the damage was already done and Chrome had already decided to wipe all my local storage and cookies. It didn't keep it in memory to save again once there was space, it just deleted it all permanently.