It would be nice to add to each example an additional line with the most common ligatures, and other with non ascii characters like ñÑáÁ¿¡?? (this are some of the relevant for Spanish, in other languages may be useful to see çàâãåøß...)
Surprised that DejaVu [1] is not mentioned. Besides that I've come to enjoy JetBrains Mono very much too.