Super Metroid's X-Ray is so cumbersome to use, I played it again recently and just wished for something like the tweet complained about.

But you're right, it's not needed, not even on the first playthrough, as no key item is hidden in such a fashion in the game. Interestingly, sometimes it doesn't even do anything, like when your path is only visually blocked by foreground.

Unfortunately, I was playing the Super Metroid / Link to the Past randomizer and had forgotten some locations, so I did have to use it every now and then.