Fil (one of the Plot developers) made https://github.com/Fil/plot-cli, and Michael Keller has https://github.com/mhkeller/plot/, which supports Plot (and Vega-Lite and Plotly). Could probably be more robust; feel free to make feature requests, I know a few other people have asked me about this.

Wow, this looks nice. Thank you!

I've been using GNUPlot in drawing chart in emacs. Plot has much better examples and I'd like to try this instead.