Not sure I could withstand 20 minutes of YouTube silliness by a hipster trying to look young and cool…
M1 Max is 432 mm2. Twice that would be slightly larger than Xeon Scalable (about 700 mm2), EPYC (750 mm2) or the largest GPU dies. Four times that as a monolithic design, at over 1300 mm2, would take a manufacturing miracle. I doubt that Apple and TSMC can do that.
Having two, or four, M1 dies on a motherboard, which each die attached to its own memory, would mean that the memory architecture is not uniform. I know about NUMA; I'm not sure how NUUMA (Non-Uniform Unified Memory Architecture) would work.
Jade is probably something different than two or four M1 Max stitched together.