The last time I saw magic stop working like this on a large scale, it was a spell cast by a specific group of people for revenge so only their magic would work. All other magic in the area completely stopped within minutes. The spell was meant to cover the world, but it was stopped from spreading very far outside of town. Everyone who was alive from magic had to run, and everyone besides this specific group would have been impacted.
For anyone who isn't annoyingly used to being cut from their magic at this point, it sucks. It's like a part of your soul is missing and I hate that any of us have to deal with this.
Tally and I have been scoring Sirius' ability to do laundry the muggle way. It's the one bright spot we're holding onto.