Earlier quoted context omitted.
> The world's most powerful CPU maybe the most powerful / watt - desktop CPUs like the 9950X are still way more powerful.
M4 still has a 10% higher Geekbench single core score than the 9950X.
Apple's also has lower memory latencies by virtue of being a SoC design. Memory speed is increasingly becoming the bottleneck compared to computing power. However this is done at the cost of other features, like repleacable/upgradable RAM and CPU, which the other desktop processors support. This is not to say that one is better than the other, but there are surely tradeoffs involved.