That's the problem. The GIS market is too broad. The ESRI products ate inaccessible to most people. They cost too much, and are too difficult to use. Precisely

That's the problem. The GIS market is too broad. The ESRI products ate inaccessible to most people. They cost too much, and are too difficult to use. Precisely because they are targeting professional cartographers. Raster algebra isn't something normal people need. I don't want to create a product for highly trained cartographers. I want to create a product for me (someone who wants to create simple information graphics).