NuPhy’s got some interesting options as well. https://nuphy.com/collections/keyboards/products/halo75-v2-qmk-via-wireless-custom-mechanical-keyboard

The low profile space is a little tricky. It leans into column staggered ergonomic boards really quickly. Kailh’s Choc switch is as low as you can go, but those folks get really custom really quick. They’re not big on function rows or arrow clusters, so the next step after Keychron or NuPhy would be something along the lines of the Afternoon Breeze. https://www.afternoonlabs.com/breeze/

Have you taken a look at any of Keychron’s offerings? https://www.keychron.com/products/keychron-k3-max-qmk-via-wireless-custom-mechanical-keyboard Checks most of the boxes other than the knob.

Modern satellites are protected by various means of encryption, but there’s an enthusiast community that tracks down and communicates with very old unencrypted zombie satellites. There’s even been an NGO which managed to fire rockets on an abandoned NASA/ESA probe (with their approval.)

The Voyagers benefits primarily from the lack of groups with an adequate deep space network to communicate with it. Their communication standards are otherwise completely open and well documented.

I still cannot believe NASA managed to re-establish a connection with Voyager 1.

That scene from The Martian where JPL had a hardware copy of Pathfinder on Earth? That’s not apocryphal. NASA keeps a lot of engineering models around for a variety of purposes including this sort of hardware troubleshooting.

It’s a practice they started after Voyager. They shot that patch off into space based off of old documentation, blueprints, and internal memos.

Zac Gorman’s comic with the original dialog: https://magicalgametime.com/post/48470399171