I input food and output energy and waste
If we ever get to a point where the energy usage in my home has to be managed at the level of a cache miss or page fault then something has gone terribly wrong.
Today, 16 would be an efficient number because it would only require a 4bit address. 10 years from now we'll likely be needing to address 32 cores or more in which case we would need 5. I haven't looked at the instruction set, but I imagine that the architecture is highly scalable.
After 8 years of full time employment and graduate study here in the US, I have come to the same conclusion:
On average, a highly-skilled STEM immigrant produces more jobs than they consume.
I'd rather offer a path to citizenship for each graduating STEM student (and their immediate family) who have employment lined up. Then we could regulate the number of immigrant-potential-citizens at the student visa level.
In seeking the unattainable, simplicity only gets in the way. -- Epigrams in Programming, ACM SIGPLAN Sept. 1982