> MonoLisa ships as a variable font with two axes. Weight gives you every cut from Thin to Black in a single file — no megabytes per style. Grade fine-tunes typographic color by adjusting stroke thickness without changing glyph widths

If any web page designer reads this, weight 1 and grade -50 is what many web pages look like, or even thinner than that. Weight 300 and grade 0 are the lower boundary of readability IMO.

A free (as money) font with most of those properties is Atkinson Hyperlegible Next, both monospace and variable width. https://www.brailleinstitute.org/freefont/

Thanks for this alternate!