There is a new Raspberry Pi Compute Module in town with the SO-DIMM form factor. The Compute Module 4S combines the Broadcom BCM2711 from the Compute Module 4 and Compute Module 4 Lite in the size of a Compute Module 3+. Moving back to the SO-DIMM form factor presents problems for HDMI and Ethernet connectivity, though.
https://www.notebookcheck.net/Raspberry-Pi-Compute-Module-4S-revealed-to-combat-the-global-chip-shortage.612225.0.html