They are not a particularly good desktop chips, though. Or rather the market niche for them is rather small (low-power and relatively high performance) and generally filled by laptops anyway.

For desktop use cases like gaming or performance intense cases they are not that great (IIRC the 14900k which cost a few hundred $ by the end was considerably faster than the top end M3 chip).

Of course high memory bandwidth + unified CPU/GPU memory is an advantage in certain cases but that also makes the system entirely unmodular.