GitHub syntax highlighting is coming. If anyone wants to help with that that would be awesome. One of the top outstanding issues. Syntax highlighting is there for sublime and codemirror but one bug left in those implementations and would love help getting syntax highlighting generation going for Monaco and linguist so we’d have it everywhere on GitHub.
Your impression is correct though, without highlighting it’s awful. Try the Tree Language designer app to see it with highlighting, type checking, autocomplete etc...there are interesting ways to accomplish everything without syntax, often not obvious. But tooling is essential to make it better than existing options. Help wanted!