This is more for discussion rather than saying "we should do it now", but I want to note that dotty seems to be going in the direction of using more string interpolation (e.g., XML literals will likely be replaced as interpolated strings), and I'd hazard a guess that using VS Code with it (or any other editor that supports the language protocol in the future) would actually show syntax errors within an editor.
This is more for discussion rather than saying "we should do it now", but I want to note that dotty seems to be going in the direction of using more string interpolation (e.g., XML literals will likely be replaced as interpolated strings), and I'd hazard a guess that using VS Code with it (or any other editor that supports the language protocol in the future) would actually show syntax errors within an editor.