I've been using Unicode when I work with Greek and Hebrew since the turn of the millenium. Unicode is great for all the reasons stated here. It is especially nice for Hebrew, because it keeps the correct right-to-left word order when there is a line break in the middle of a string of Hebrew text.
The problem--in my limited experience--is that most publishers remain wedded to legacy fonts. Until publishers and editors get on board, it is not true that "Unicode Fonts Unite Biblical Studies."