The one that lights up in the mirror is easy to spot. The one Tesla put in the interior, that tiny red dot is not easy to see.
You look in the mirror, and if the blind spot indicator is in the mirror, it is right within your immediate peripheral vision. The tiny red dot where Tesla placed the blind spot indicator is not. To you it may work. To some, like with me and JeffKeryk, it’s misplaced.
Looking in the screen for my blind spot is another unnecessary thing to do IMO. When I make really quick lane changes, I don’t even use the screen. The only time I use it for my blind spot is when I am only cruising along. Again it works for some, to me it does not.