My WS-5000 also just died, after 2 years - but I'm in a tough marine environment where electronics struggle to survive.
I decided to try a WS-2902, but experienced numerous WiFi connectivity issues, so I am an in process of returning that array. FWIW, I found Ambient tech support to be very poor, so I'm looking for a better supplier.
I may be heading for a Davis 6242, but need to research if / how many sensors are replaceable. With the WS-5000, everything is integrated such that if one sensor fails, the array is disposable.