Wow, I didn't think I wanted ligatures and so I never turned them on. But based on your comment, I just tried it and I found that I love it! The little visual blip! when the characters merge does in fact provide a nice little feedback that I've typed the right thing.

And also the two-character => arrow in fat-arrow functions always kind of bugged me a little bit and it is nice to have it condensed to a single visual entity.

Woo hoo! I will leave ligatures on from now on.