I had the same thought regarding the renderer — the worst case scenario would be a complex design with correct code that renders incorrectly in the app. I’d sacrifice frames per second just to avoid ever being in that position.

Regarding the text editor — I can’t stand using any editor that doesn’t have the hotkeys and multi cursor editing that I’m used to. I even stopped using note apps and just use vscode anytime I need to author more than a paragraph of text.

I worry that a clever image caching strategy and the Monaco npm package would be a better alternative for many reasons — especially considering the role that easy access to Devtools plays in the design process, which you also lose with a canvas.