You are right, but if you look at you % of the total market hash, you can keep your ratio spending way less and that might still make it profitable. Really depends on price and availability of the super ASICS more than the energy price.
Discussion
If I understand you correctly, during the transition super ASICs will be much more profitable and even home miners will yield a large enough margin to justify the costs.
If so, yes I agree and that makes sense.
Then the only question becomes "how fast can we migrate everything to superconductors?" 😏
That is basically my point, yes. Superconductors will cut the KW/hash by orders of magnitude. Then depending on how fast you can replace the olde miners, the network hash rate will just balloon or the mining cost will plummet. Or both.