It can be tricky to make it work in Vim + Tmux etc., but it can be done provided the font includes it as normal italic typefaces. I use Victor Mono and iirc it's available in two variants depending on whether you want normal italic font or cursive.

I've been using it for a while now, can't say it makes a big difference(both positive or negative), but it kind of looks nice which is the point in the end.