Earlier quoted context omitted.
Which brings us back to the point of ligatures which are combining so make a single of what is a double or triple and hence no monospace any longer. No judgement if that is good or bad or at all. Just a reminder that it ain't monospace any longer. > Your code is still monospaced in all the ways that matter. Just it ain't monospace any longer. (reminder)
Can't it still be mono space if the ligatures take up the same space as their components?
In monospace one letter/symbol (printable character) has constant width.
The ligature is one letter/symbol. so while the stylistic decision retains the monospace style of the replaced symbols, the ligature itself is double (or triple) sized compared with other symbols.
IIRC this is commonly called "monospaced ligatures" ref https://github.com/tonsky/FiraCode/issues/712