Stable update: Follow behavior; BBC micro:Bit plugin; Flowcharts improvements & lots more.
WebGPU 'Auto' mode is giving me the WebGL renderer in r388, so it looks like it's working as intended.
found the reason, I had "enable experimental features" checked in the settings
That explains it - the experimental features setting allows opting-in to the same defaults as beta releases use, so it will default to WebGPU enabled with that.
that's weird, it's webGPU for me, I double checked version etc