Flexible threads avoid scarring of rigid arrays

Neuralink's tiny flexible polymer-insulated threads (16-84 microns wide, under 5 microns thick) avoid the bad immune response that encapsulates rigid electrodes like the Utah Array in scar tissue, because the size and flexibility plus the robot's avoidance of vasculature mutes the immune response, and histology of chronically implanted animals shows neurons abutting the threads with essentially zero detectable trauma or collagen scarring.