So much this. For us we use it most when we get the tomato bonanza for a few months in summer to make quarts of fresh tomato sauce, and any other high volume hot soup (or in my case, slow cooker saag). And like @Johnny_Bravo I can untwist the working head and wash it fast, unlike breaking down my blender or food processor which takes up a lot of space in use and in cleaning.
I have a blender, a food processor, and an immersion blender (thankfully I have a house), and right now if I had to downsize it’d be the food processor. Not that I don’t use it (probably every other week) but because it’s the hardest to clean and takes up the most space, and the other two are smaller and still versatile.