Performance per watt is not far at all from M4. The Ryzen AI 9 HX 370 actually beats a M4 Max in e.g. Passmark per Watt (652 vs 625), and it's not much behind in other benchmarks.

With some tweaks, it can also be silent. Good ThinkPads are not far from the user experience delivered by the latest MacBooks, and they have the advantage of running free software and x86_64.