Semi-related: does anyone have WebGPU running on an M1 Mac? Pretty sure it "can be done" but the appropriate experimental options are not even there on either Safari or Chrome...
WebGPU is enabled by default in Chrome on Mac as part of the WebGPU Origin Trial (https://web.dev/gpu). We didn't really test on M1 Macs but several people reported it just works.
I got it going by passing "--enable-unsafe-webgpu" actually on the command line. Thanks.