You can have parts of the web app rendered on the client, and still keep the rest of the app the same. Rewrite the diffs and previews, keep the rest as-is. The

You can have parts of the web app rendered on the client, and still keep the rest of the app the same. Rewrite the diffs and previews, keep the rest as-is. There is no excuse for possibly the most used feature of Github to suck so badly.