Yeah, the frequency shift "time dialation" of Radar & Lidar for traffic tickets and even Time-of-Flight imaging for your FaceID all involve the constant speed o

Yeah, the frequency shift "time dialation" of Radar & Lidar for traffic tickets and even Time-of-Flight imaging for your FaceID all involve the constant speed of light or special relativity... but yes, all of magnetism can be derived as a special relativistic case of electro-statics (relativistically moving charges). For me, the more annoying aspect to this is that the "it's all relative man" has infected even more techincal discussions to the point where engineering and settled science is treated as just more "woo woo" by people who could know better.