Nobody would say „trujący wąż” (poisonous snake) or „jadowity grzyb” (venomous mushroom). The distinction is similar to English. There are exceptions and contexts where it can be used interchangeably but arguably the same is true for English.
The primary use case that I can see is following: you use your second phone — the communicator — to chat, while watching endless stream of tiktoks/reels/shorts on the first one.
That depends on your architecture and access pattern. In case of sequential access, packed bools may perform better due to arithmetic being usually way cheaper than memory operations.
In this case there is both time a distance limit to the gesture. If the gesture is too fast the switcher won’t appear even if the distance was long enough.
That said, personally I’ve always found the gesture navigation very intuitive.
Windows Update makes Windows barely usable. Weekly restarts to update OS at random points in time are unacceptable. There are plenty of other usability issues, for me lack of working Unix-like shell out of the box is one of them.