The release notes say it was to hold dry ingredients together. It was successful; the bar I had didn’t make any crumbs. I would be willing to have a more messy bar if it would make the taste a little less extreme though.
Edit: I almost forgot! The bars say “1.0” on the side of the box, so they’re at version 1.0. The Coffiest says “Cof___v01__JP” on the bottom of the box, so I’m gonna say the Coffiest is at 1.0 as well. The Coffiest box also says “Soylent 2.0” on one end next to the expiration date.