alt Hacker NewsAt those higher altitudes they are trivial for radar to detect, and from farther away too. They are adapting cheap commodity used marine radars to get this done in some places
I suspect the Shaheds are going higher to mitigate AA ground fire. Higher up you have to send a missile or interceptor up.
It’s a trade off.
And interceptors are more expensive than Shaheds. A $100k interceptor (guessing here) to shoot a $10k Shahed can be an acceptable deal for the side launching the Shaheds.