It's a shame
The technology in DJI's drones is very impressive. I was considering the purchase of an Inspire for aerial photography, but wouldn't touch anything from DJI after this.
I have this strange, possibly old fashioned idea that if I pay money for something, it's mine. Disabling a product after purchase is on very shaky legal ground. I will have to ask my lawyer about this the next time I see him.
I'm sure here in the US this would be grounds for a class action lawsuit. Even if the EULA grants them the authority to do this, I don't think a court will side with them. It would be hard to get 12 regular people off of the street to agree that a corporation (especially a foreign one) can disable an expensive toy without refunding the purchase price.
I would love to see the FTC demand that DJI buy back every bricked drone at the retail price.