Why would you not want to use the interface on the Pi? Maybe you come at the Pi from a different angle, just a thing to attach sensors to.
The kids in an educational sense use them as the computer. But also attach sensors and interface with it, what’s lacking at the moment is a nice, easy way to interface with the sensors, play with them and log and have a pretty usable display. The interfacing is not hard, most sensors are written for and Raspberry/Raspian are doing a good job of simplifying everything. It’s just the other half that’s still mainly in text and csv files.
So to me testing right there on the device is just common sense, you don’t have to move out the chair
(first and foremost the RaspberryPI is an educational tool, that is the foundations goal and why it came about and their push, it’s the community using it for everything else)
also many IoT setups (I assume and following many projects) would use the Pi as a way to display a GUI for the interface and hence fire up a browser and show allsorts if they could program it.
A current craze is doing it with mirrors (well a monitor via HDMI as normal but made to look cool), and of course a screen attached directly to it (current official 7" touch are quite nice) and of course a normal monitor and mouse etc.
So it could just be stuck on a wall for quick monitoring locally.
Cayenne I assume would still go via the cloud unless you can build in local monitoring bypassing the cloud ?
It might well be something to have a chat with the Epithany maintainer see if they can do anything to implement features, I know the older Pi’s lack power for the browser.
(I say this and I’ve not had chance to play yet. But it has the potential to be just what I was looking for educational and home plans so thinking ahead and sorry for the ramblings…