I shot slide film exclusively (except for a few rolls of bw) from around 1990-2010 (in other words two decades). Kodak E100G was my favorite and it looks like this will be a reinvention of that. The main reason for using slide (positive) instead of print (negative) was to shoot for publication, as that is what they required (not that I got published very often, but occasionally). Now that digital is the de facto medium for this, I see little use for slide film. As someone has already said, print film is preferable for portrait and wedding, which is where film is still being used. Just within the last month I traded in my film body because in spite of the nostalgia I realized I would never use it again.
Of course I have no problem with Kodak producing slide film again (Fuji btw never stopped), I am just not sure if there is a market to sustain it. I guess there must be or they would not be doing it.
I shot slide film extensively (along with a lot of black and white, especially in the early years) from the late 1970s well into the 21st century, a span of nearly three decades. My work, both editorial and commercial, was nearly always for publication, so transparencies were almost the universal rule. Thus, I always considered color negative to be the bastard stepchild of the film family, devoid of sharpness, saturation and the "look", and to be used only as a last resort.
Maybe it's because I taught myself to deal with the limited color and contrast latitudes in these materials that I developed this disdain for color neg and considered the portrait and wedding guys to have things a little soft. As a photojournalist dating back to college days and later picking up the advertising work, I shot Kodachrome (later Velvia) when there was good light and Ektachrome when there was not, in the process learning to push the ASA (the old ISO equivalent) to the "astronomical" to 1000 or so. It always seemed a challenge to get things just right out of the camera, but, when they were, they were great.
I'm looking forward to get my hands on the Ektachrome. Guess I will now keep my last film body around.