brain fart on my end, you're definitely correct that SQUIDS are not something demonstrated quite yet, I should have said Josephson junction, but even that seems more niche than I had thought when I wrote the comment.
your comment oscillates between incorrect and incoherent. squids have been demonstrated for decades (i didn't assert they hadn't been) and are made of josephson junctions, whose nicheness is not at issue in this discussion. i hope you get better because you clearly were not well when you wrote this