Hackaday Guide to the New Raspberry Pi Compute Module 4

Sadly, the Truing Pi looks to be the last Raspberry Pi cluster board of it's kind. Moving away from the SO-DIMM form factor might be a good idea for the Pi foundation, but it's not good for people who were hoping for a drop-in replacement for the CM3, or for folks who were even just hoping for a Raspberry Pi version of Turing Pi (the CM4 lies flat instead of vertical).