I think Kent once told me that he resisted making a Bold-Italic originally but he knew he eventually would have to make one.

hhp

I really do hope he comes up with a Bold-Italic as many creative people have a high demand for it.
[I did contact Kent about that but got no reply]

Markus

Some designers choose to leave out bold italic on purpose, when they make classic book faces. I did the same with Delicato. depending on demands I might reconcider this in the future, just like Hrant mentioned Kent did...
http://www.macrhino.com

Wow - Delicato is also one of my favourites!! And reconsidering a Bold Italic is a very good decision - many will highly appreciate that.