They're also ubiquitous for creative works, i.e. the sort of things a small set of people spend much time on, but is not something most people use. Examples:
- CAD / ECAD
- Artist/photos
- Musician software. Composing, DAW etc
- Scientific software of all domains, drug design etc
Adobe Photoshop, the most used tool for professional digital art, especially in raster graphics editing, is was first example of a perfectly fine commercial desktop application converted to cloud application with a single purpose - increased profit for Adobe.