Lots of info here: https://forum.mysensors.org/topic/8735/cnc-pcb-milling?_=1624294898545 It's as close as you'll find to a complete walkthru.
Turnaround is faster than JLPCB (an hour vs days). Otherwise, I would agree. TL;DR: for rapid iteration, or you simply want something fast, DIY PCB's are hard to beat.
As to topicality, it's a subject not covered well on most other forums. CNC Zone has some posts, but that's about it.
All in all, the tools keep getting better, and it's easier now than before to find speciallized bits that make the work easier.
