I’d like to see a literate programming version of GitHub where the community standardizes around an eminently-readable Markdown-like syntax. srcweave [1] looks like a great start.
See https://observablehq.com/@observablehq/a-taste-of-observable... as a quick overview.
To plug my own work, I have written https://observablehq.com/@mjbo/genre-map-explorer-for-spotif... in a literate style, and many of the Observable community are similar adherents to literate programming.
Codesandbox and Google Colab come close but they still feel like tanks. I can code something up on my phone with Observable while waiting in line at the DMV...