Reasonable in-browser code editor? Eclipse Theia, Stackblitz & Codesandbox share neat approach.

Why would I need an in-browser editor? Code editing on a go, remote tech interviews and the rising popularity of moving most tools to be browser runnable (like new AutoCad or Office) raised for me an obvious thought: why, is a good in-browser code editor still missing? Or maybe it already exists? I'm not a [...]