I have that keyboard and gifted one to my parents. Our use case is the odd chance you need to input text or use a browser on a Smart TV. Works so much faster than the on screen keyboard. With many Smart TVs just being Android under the hood, it just works.

I find for server troubleshooting, I usually have no problem grabbing a random USB keyboard. The bigger problem is finding a screen at a convenient location and connecting that one. It often was easier to carry my server to the screen instead of the other way.

On the topic of niche input methods, I also have an "air mouse" [1] with a full keyboard on the back for my Kodi system or when connecting my desktop to the TV. I essentially never need to use it, but it has come in handy.

[1] https://www.amazon.de/gp/product/B0B1HKWFQV

The iPad now supports external webcams, so you can use a $5 HDMI capture card (and the free Genki Studio app) to turn it into a monitor.

I have one of these and it's great for this sort of thing. The whole keyboard runs off one AA battery which lasts forever, and it even has a storage spot for the USB dongle.