When I was ministering in the United States (mainly Newark, NJ and Tri-State area), I never came across black vestments in use in the liturgy. It was a theoretic option for November 2 and Funeral Masses/Masses for the Dead, but I have never actually seen it in use or had a family request it. In my experience in the US white was the main color for funeral Masses.
In Ireland things are more or less the same, with, in my experience, about 1/3 of funerals using violet rather than white for funerals.
However, this week, I received an email from Veritas, the biggest religious store here, advertising their latest sampling of vestments. Among these they had a Black Chasuble with River Cross and Vines. One example of black out of 34 is not necessarily an indication of a huge increase in black vestments. It is also worth noting that there is one “pink and purple” example (I have written before how the rose option is very rarely used here) and one blue option (I imagine this is for any Spanish priest who is vacationing in Ireland and wishes to buy vestments in Ireland to bring home with him to Spain, as there is no option for blue vestments here).
Ten years ago, there was a discussion on PrayTell on the use of Black Vestments in Madison, WI. Now ten years later, it might be good to reflect on whether the liturgical use of black is more or less common.
In the Irish context, I think that this is simply a case of Veritas importing vestments that their supplier had available and that there was little thought as to the popularity of black vestments being used here and that this was not an attempt by Veritas to influence the choice of liturgical color used in Irish Funeral Masses. But perhaps there is an increase in the use of Black Vestments in other places or areas that I am unfamiliar with.