This is not a question but I did not know where else to place this:
Raspberry Pi Foundation announces Compute Module 4 now ready for sale
Representatives of the Raspberry Pi Foundation have announced on their blog that the Compute Module 4 is now ready for sale starting at $25. The system-on-module variant of the Raspberry Pi 4 runs the same 64-bit quad-core BCM2711 application processor.
techxplore.com