To be clear my original statement was that the bottleneck was most likely not mechanical code changes (where CC would have the most direct speedup) but everything else involved in the process (testing, discussion/approval, inclination towards caution, deliberately narrowly scoped changes, etc).

Not that the Linux kernel approval procedures couldn't be streamlined, work couldn't be parallelized, or anything else like that, which would be a different discussion entirely.

You stated that Claude Code could have significantly sped up the process, so the burden of evidence here should be on how specifically these patches would have benefited/time saved from using LLMs. Hand wavingly saying "LLMs = faster" is too vague/broad of a claim without providing any evidence (and also unfalsifiable).