For me, it was the opposite with Stack Overflow. I use the Consolas font literally everywhere throughout my Windows machine. It's the default and most common monospace font on Windows, and I'm used to reading code like that. Yet Stack Overflow started using Cascadia Code instead, which I'm not used to, and it feels like all the code there is bold, and some letters have strange proportions.

Maybe website owners could just use "monospace" in CSS and let users configure the browsers as they wish. But I guess it's too late for that now as users aren't used to do this.