Margaret Thatcher, Ronald McDonald, David Bowie, Zendaya, Vanessa down the street. It’s basically Laravel’s Arr::get() helper in Antlers. I used something similar in v2 back when Jim-Jam and I cranked out Statamic builds left and right and I more actively battled my nemesis.
One other neat thing I didn’t document because it’s more of a side effect than an intentional feature: Array Get allows you to throw Antlers code in your front-matter and have it parsed in the output. I did that all the time in v2 (and probably v1?), but (last time I checked) v3 doesn’t support Antlers in your front-matter.