I'm a Gregg writer, but am fairly well informed about other systems of shorthand. My impression is that Forkner shorthand is experiencing a recent surge in interest. (The few textbooks that show up on Ebay etc. are listed for very high asking prices).
I'm curious what attracts people to Forkner, instead of another alphabetic system like Speedwriting, which was much better known, more widely taught, and has more readily available books and materials. (There were other published alphabetic systems as well, of course, such as Stenoscript and SuperWrite).
After learning Gregg in the 1960s, with its primarily phonetic basis, the logic of most alphabetic systems continues to elude me, although I definitely understand the appeal of a shorthand that looks like longhand cursive writing.
I'm also curious if the fact that many people today don't learn cursive handwriting is an impediment to learning any of the alphabetic systems, which seem to me to presume familiarity with looped cursive letters