[jakobegger]

That image is a bit misleading. Those fonts all have a very different feel in the UI.

For example, I never really liked when Apple switched from Lucida Grande as the main UI Font to Helvetica, and I was very relieved when they replaced Helvetica with San Francisco.

I think San Francisco is a decent UI font -- it's much better than Helvetica. I don't particularly like it, but at least it doesn't annoy me.

The differences are subtle. If you show me short strings I probably wouldn't know them apart, but changing the font for the whole UI has a big effect.