@vitalik.eth
Here's an EIP for adding a separate gas type to calldata, and putting the three gas types into a single harmonized system:
https://github.com/ethereum/EIPs/blob/4020064d72da32adc691cf1906f466a2c03b00f5/EIPS/eip-7706.md
Hopefully it can make the discussion on what "multidimensional gas" might look like more concrete!