A few weeks ago I added support for structured data, written in YAML and rendered via Pug, and more than anything else it was a relief. I could easily try out different ways of presenting the data without having to move everything around.
But there are some kinds of data that were annoying to express in YAML, in particular dense tabular data, and so I’ve added support for TSV as a data source for Pug templates. (Spreadsheet software seems to place TSV data on the clipboard rather than CSV.) So far it’s a good fit.