Honestly, in almost all places that monospaced fonts are used, they’re purely a stylistic choice. (The remainder is mostly ASCII art, or plain-text representations of tables—in which case alignment is important, not the font—or something where tabular figures are desirable for number alignment.) I don’t say that that makes it useless in any way, but honestly monospaced text in code editing is overrated. You can live without it easily, and will probably get used to it very quickly.