Why are so many people angry at a situation that doesn't exist?
The use cases above don't need a $385 16GB Raspberry Pi 5.
Did you notice they weren't even using a Raspberry Pi 5?
A 1GB Raspberry Pi 4, which would run those applications, is $35 and in stock: https://www.pishop.us/product/raspberry-pi-4-model-b-1gb/
You are the one making up a situation here.
I'll quote it for you:
> A Pi 4 is my son's primary computer
So, no, I am not making up a situation.
Even if using those, if it's not in a robot or a weatherproof box on a pole or something, then a usb gpio dongle on a pc or mac makes 900x more sense.
The fact that something is done does not serve as an example that something makes any sense to do.
Using a pi for a computer is like when women knit sweaters for things that don't benefit from sweaters.