Listening to American YouTubers who do technical stuff (electronics, engineering,...) are truly painful and confusing. They constantly switch between imperial and metric. For example wire gauge is in AWG, but the polyimide tape is always in millimeters. The measurements and files/rasps are in imperial (e.g., 1/32nd or the other one), but 3D units printing is in mm.
We are officially 201 years after British Weights and Measures Act of 1824. Maybe it is time all of us switch to #metric!