You're missing the point. What in heaven's name justifies implementing 8GB blocks? By your logic, we can just have 64GB blocks and even more prohibitive costs to running nodes. After all, who cares, right?

Certainly, current transaction volume doesn't suggest this is necessary at all. Why aim for Moore's Law? Let's observe how robust scalability is on a more conservative basis, and keep limit increases in line with actual transaction growth (rather than this fantasy that Moore's Law = bitcoin adoption rising exponentially, endlessly).