Or it could be that Apple, will have 12 in hardware, but only 6GB available unless you pay the Apple tax.What's interesting is that teardowns of the M4 iPad Pros show they actually have 12GB of RAM not 8GB advertised; 2x 6GB RAM modules instead of 2x 4GB (based on the serial numbers off of the physical LPDDR5X chips attached to the SoC).
Supposedly 6GB modules are currently cheaper than 4GB modules so it could be cheaper for Apple to put 12 in the iPad and call it 8 (giving them the option to drop it back down to 8 if the pricing changes, hence why they're not advertising it as 12). Or it could be that Apple is building M4 chips with 12 by default and that 12GB will be the new starting tier for base Macs. While not the jump to 16 most users are hoping for it at least would get us off of 8.