I recently went to PCBEast in Boxboro. I’ve uploaded a writeup, as well as included some pictures and videos to the git repo. Link: https://git.steakelectronics.com/adminguy/Electronics_Projects_2023
Some highlights from the expo include: Ultra-HDI pcb fabrication, Nasa’s component testing for space: INST-002, EMScan, custom flex pcbs, and $25,000 PCBs.