(Edit 2021: In the latest Safari 14.2 the Shadertoy does not work and my crash or hang the display. This is unfortunately a regression.)
This is a quick post thrown together to report on my experience with the new Safari 14 regarding support for WebGL 2. The news of improved WebGL support was floated last month in the Shadertoy Community Group:Fast forward to today and the Safari 14 update has now come to my laptop (which still runs macOS Mojave). So the first thing I did check out all my shaders on Shadertoy and then some to see if the promises were true. My verdict (TL/DR):