@Bri_L, well, what brings a sense of child-like wonder to my perception here is how dead simple the selector is when using the instant alpha tool in Preview. It’s click-and-move-the-mouse-slightly-to-adjust-sensitivity. That’s it.
Compared to Photoshop’s magic wand tool with a separate sensitivity selector widget. That’s click, nope too much. Adjust sensitivity. Click, nope too little. Adjust. Click, errrr, maybe that’s the best? Try again anyway. D’oh! Too much!
And then the fact that you can reverse the instant alpha to restore any area that you may have inadvertently removed. Holy kaw!
In Photoshop, you’d be mucking with layers, masks, saved selections, the history tab… and taking 10 times as long.
No, Preview ain’t Photoshop. I’d never give up PS. But dang if they didn’t simplify that one thing in Preview to a point that almost seems magical.