Elias fell into a flow state. Without the distractions of "Generative Recolor" pop-ups or cloud-sync notifications, his workflow was surgical. He manipulated the anchor points, adjusted the curves, and rasterized the final output.
Inkscape: A free, open-source vector editor that is highly capable. cs download illustrator
If you're looking for older versions of Illustrator, such as CS6 or CS5, you can try the following options: Elias fell into a flow state