The news here is not that APPLE will use this node, but that engineers at TSMC and others still manage the give us a full node transistor shrink every few years (even if it's not every 18 months, and maybe not even every 2 years, but more like every 2.5-3 years now), despite and because it has become more and more challenging to make smaller and smaller transistors.
Decades ago there were like 30 chip makers, not it's like 3: TSMC, SAMSUNG and INTEL (out of which TSMC makes the most power efficient chips).