That's an IDE configuration problem. Most of them support mixed-mode syntax highlighting nowadays, so you just need to configure your theme to treat block comme

That's an IDE configuration problem. Most of them support mixed-mode syntax highlighting nowadays, so you just need to configure your theme to treat block comments as Markdown (or LaTeX, HTML, whatever). You could probably even do it with Markdown directly, using fenced code blocks as part of your begin/end lines. I think you'll find that this approach offers very little benefit over either traditional commentary or linear notebook-style inline code blocks.