Update on my update re: Sony wh1000mx3 headphones and Linux Bluetooth failure to connect: got it working, didn’t need any extra software either. The Sony’s will prompt themselves into pairing mode if another device tries to connect and they aren’t paired with another device, so I’ve never activated pairing mode on them before. The Linux (zorin) bluetooth software won’t try to pair with a device not in pairing mode, so they were like shy kids who want to dance with each other but won’t ask. In short, like the overwhelming majority of my problems: user error.
Hope my verbose incompetence saves some future googler a few minutes of frustration.
Fore and aft rigged ships sail into the wind pretty well, but square rigged ships were better outfitted for running with the trades. This design would probably do something similar, but yeah, next they’ll invent masts and yardarms and booms, and then we’ll be back to squabbling over trade routes in the Caribbean.