Selecting the best brain-computer interface in 2026 is no longer a theoretical exercise. The category now spans FDA-approved clinical implants generating long-term human data, consumer EEG wearables with machine learning decoders, endovascular devices enabling paralyzed patients to control iPads, and next-generation neural-AI integration architectures targeting the cognitive interface layer. The range of options, use cases, performance specifications, and risk profiles has never been wider,...