Pen and paper first
Hexagon
Depends on what you expect them to do exactly. Today's transistors aren't much different than older ones, just smaller mainly. People of, say, 20-30 years ago may have the technology to inspect them (electron microscope or something like that), and the knowledge to understand them, but not the equipment to reproduce them.
If you go much farther back in time, say before integrated circuits (1960) or even transistors (1947) were invented, I think it's unlikely that someone could reverse engineer the thing
Only for the next 5 billion years! And then what???
I use syncthing to mirror to a raspberry pi NAS. Set it and forget it
Reminds me of this one
Point them to the same file, and overwrite the file each time.
(Unless one of them caches the content somewhere else)
It won't stop unless we also remove the greenhouse gases that we put there
Remember the part where Krillin and Piccollo make 2 copies of themselves to fight Nappa? They edited that moment to look like they make Naruto's technique
Have you considered a shared folder with Syncthing?
For me it was "Kage bunshin no jutsu!"
I noticed the familiar but unexpected sound effect just before the line, and then it hit me full force
I have an NFT joke, but it's worthless