Something for the sanding list: Navigating between https://blog.jim-nielsen.com/about/ and https://blog.jim-nielsen.com makes the layout shift a bit in Safari on macOS. The reason is that Safari only shows the scrollbar when it's needed but without "reserving" the space.

I once spent hours debugging this before I realized what was happening, my confusion coming from the fact that with the inspector open that wasn't the case (As there the scrollbar was always visible...).