Yes, the M4 is still outperforming the desktop 9950X in single-threaded performance on several benchmarks like Geekbench and Cinebench 2024 [1]. Compared to the 9955HX, which is the same physical chip as the 9950X but lower clocked for mobile, the difference is slightly larger. But the 16 core 9950X is obviously much better than the base M4 (and even the 16 core M4 Max, which has only 12 P cores and 4 E cores) at multithreaded applications.

However, the M2 in the blog post is from 2022 and isn't quite as blazingly fast in single thread performance.

[1] https://nanoreview.net/en/cpu-compare/apple-m4-8-cores-vs-am...