Depends what it does, how well. I use both Painter and PS, and have had other (cheapo) editors in the past. I bought Illustrator as part of the bundle when I got PS and quickly came to prefer it to Freehand, though I still use the latter for some things. For that matter, I have Vue but still buy many of the RDNA MicroCosm packs. There are many reasons for using two or more similar applications, and for switching, so until we see what D|S amounts to, and what the plugins do and how, assessing its place in the market seems premature. With luck we will fairly soon be able to form our first impressions.