- Ultra-low-field room-temperature magnetometers (~1 mm³) capable of detecting 0.1 nT neural magnetic fields at the source (100 fT at the skull) are in working-prototype form; they internally cancel Earth’s field and are initially targeted at peripheral-nerve recording rather than whole-brain MEG.  
- Compared with electrical recordings, magnetic fields suffer less “smearing” in conductive tissue, potentially simplifying source-localization once dense multi-sensor arrays are deployed.  
- Discussion of open-source personal-data infrastructure: participants lament the lack of APIs in closed messaging apps (e.g., Facebook Messenger, iMessage) and advocate mirroring all data to a local filesystem so that tools like grep/rg can provide fast, unified search across email, chat logs, and other archives.  
- Email is highlighted as the last major open protocol that still permits full user control and archival, underscoring its importance for long-term personal knowledge bases.  
- Brief strategic aside on corporate asset seizure: intellectual property and R&D staff (“buying people”) are viewed as more durable value than easily outdated production facilities.