Hi all! I've been on these forums (Started with PhantomPilots.com) since 2015 when I purchased my first DJI drone, the Phantom 3 Advanced. Granted I don't post much at all, but read almost all. I currently have the P3A (DJI Go before
P4), Mavic Pro Alpine Edition, Spark,
Mavic 2 Zoom (DJI Go 4),
Mavic Air 2, and
Mavic Mini 2 (DJI Fly).
Since the DJI Go before
P4 app, the RTH function (all three scenarios Failsafe, Smart, Low Battery) hasn't really changed, the exception was obstacle avoidance and now increased it's "within 20m to 50m. Imagine standing in the middle of a football field on the 50 yard line. The distance (50m) is just beyond the goal posts. That isn't that far. If there are obstacles (houses, buildings, trees, power lines) within that short of a distance and you're worried about it crashing into something regardless of why it went into an RTH function, then you are probably BVLOS (can't see the drone regardless of distance) and or flying where you shouldn't be.
I fly in a Home Depot warehouse sometimes, in and around all the aisles. because of the close proximity, short distances, and many obstacles to go in case of recovery, just set the rth to hove in place. I can walk to it easily. And if it goes into a low batt RTH, and lands on something that it should not of, well then poor piloting on me. And NO, I don't fly when the store is opened nor when there are people around.
However, if you are into racing drones where replacement parts are inexpensive for the most part and love to fly in, out, and around obstacles and still record your flight, then maybe that's the way you should fly. A 50m radius is a typical course size, a football field or smaller. But you better know how to fly, they are not like these drones (DJI flying cameras) where the computer pretty much maintains control for you, unless you fly in atti mode, but the computer still helps maintains altitude.
Happy and Safe Flying