From what I've seen with backers of first Sentry, a lot of people have issue with having small apartments in big expensive cities, so they have fairly standard sized desks, but they want to use big monitors like ultrawides and have reasons for not wanting to have a big tower under the desk. So it's like small apartments and desks not catching up with the screen size trends.
Other than that, it's the console-size, because putting a tower case next to the TV rack is not aesthetically appealing, and stuff like RVZ01/ML08/Node202 is significantly bigger than console/sat receiver, so the disproportion makes it not look good together.
And obviously enthusiasts and people who want something different than standard towers, something unique standing on their desk.
Oh for sure, I just though I'd respond in kind when someone questions my legitimate use case