When I'm using Kona, I've often got it in it's own Safari window, so I get alerts as my team updates things. I often have two other Safari windows open, each with several tabs each, as we work to update my website to its new home.
This is about screen real estate! In my work space in Kona, there's an entire right side bar that I don't need. I'd love to get it out of sight so I can just see the center. Even the left side bar could disappear when I'm busy.
Please consider building a View menu into settings, with one, both, or no sidebars as options.