Microsoft "We're incredibly excited to announce the #powerapps modern commanding is generally available! Building powerful, purposeful command bars for your #powerplatform apps is incredibly simple now with the first ever in-product command designer, #powerfx, and close integration with canvas custom pages and component libraries. "
Scott Durow “if you have model-driven command buttons created in the Ribbon Workbench - it's time to start the move over to the modern command designer...Why? Because woot! 🎉 it's just gone GA! You can still call JavaScript if needed, but you might even be able to convert and simplify it using Power Fx. Check out Casey's blog post 👇”
https://develop1.net/public/post/2021/07/25/RibbonWorkbench-vs-PowerFx