Although I don’t use my iPhone’s Reachability interface that often, I do think that the gesture for invoking it is particularly clever on notched devices. Unfortunately, since I don’t really use Reachability that much, I find that the gesture goes to waste more than being useful.
If, like me, you rarely use the Reachability interface and would rather use the convenient Home Bar-based gesture for something more useful, then you’ll probably like a newly released and free jailbreak tweak called CantReachMe by iOS developer woodfairy. With it, you can map the native Reachability gesture to a new action of your choosing.