For anyone who wants to actually try the new layer, it's called "Shortbread" and can be accessed under the layers selector. Or use this link: https://www.openstreetmap.org/#map&layers=S

The blog post could do a better job of surfacing that bit!

You can compare it to the existing vector tile layer created by MapTiler, which mimics the classic raster tile style: https://www.openstreetmap.org/#map&layers=V