Jack Wallen/ZDNETWhen System76 announced that it would be creating a new Linux desktop environment from scratch and using the Rust programming language, I was skeptical, not in the company’s ability to deliver but the reason behind the choice. Pop!_OS has been an outstanding OS to date, a perfect re-imagining of the GNOME desktop (from which it was based) that was efficient and easy to use.Then, I started seeing the early mockups and realized the company wasn’t reinventing the wheel. It was re-creating what it already had… only without the GNOME dependencies. Also: You can test all the best Linux distros right in your web browser with this siteThat’s when it all made sense. By creating the OS in-house, it could tweak it to the exact specifications needed so that it would run beautifully on its hardware. And given the speed of Rust, it also made perfect sense that it’d use that particular language to build its new platform.According to the Pop!_OS site, System76 had this to say about its new OS: “We aim to liberate the computer with a new desktop environment powerful enough to build custom OS experiences — for users, developers, and makers of any device with a screen.”Well, the latest Alpha of Pop!_OS (a4) has been released, and it shows just how serious System76 is with its new operating system.I’ve been using Pop!_OS for nearly 10 years now (with a brief excursion into Ubuntu Budgie land), so I feel pretty confident when I say that the new COSMIC desktop takes everything that was good in Pop!_OS and made it even better.Also: This Linux distribution surprised me with its minimalistic yet highly-functional OSFirst off, COSMIC is more customizable than the previous incarnation. Without having to install a third-party extension, you can tweak the transparency of both the top bar and the dock. You can also configure the dock to “float” so it doesn’t touch the edge of the display. But more than anything, it’s the sheer speed of COSMIC desktop that makes the previous iteration feel sluggish. I installed Pop!_OS Alpha 4 as a virtual machine with only 3GB of RAM and 2 CPU cores and it performed as well (and better in some cases) than the host OS which had the full complement of RAM and CPU cores. That’s impressive.One of the biggest performance bumps is found in Pop Shop (the Pop!_OS app store, which is now called COSMIC Shop). Previous versions were well known for being slow and problematic. It would take forever to open and randomly crash. The new COSMIC Shop is light years ahead of that. Not only is the new COSMIC Shop exponentially more stable, but it also opens immediately… which is a relief.Same as it ever wasSystem76 made the right choice in not totally reinventing the wheel. The developers and designers could have gone back to the drawing board and created a desktop environment that was a total departure from what they’d been offering.That would have been a mistake.Also: Want to save your old computer? Try these 5 Linux distributionsInstead, they decided to simply remake what they had, keeping the UI almost identical to the previous releases. By doing this, System76 won’t have a bunch of frustrated users on its hands when COSMIC desktop is finally released for general availability. System76 smartly retained Flathub support for the OS (as well as baking it into Pop Shop), so installing applications of all sorts is just a click away. More