Thankfully, all nine of mine are still alive after 2 1/2 years. The same cannot be said for the bulbs that were sold with them. All of those developed an annoying flicker right at the 2 year mark.
I’m curious - what did you have plugged into them? The best zigbee outlets I’ve had were the Iris V2 outlets and SmartThings V2. These things have lasted 7-8 years.
I’ve had several Tradfri others fail. Innr outlets haven’t failed, but I’ve only had them for 2-3 years. Same with the eWeLink ones - mine haven’t failed, but is only been 2 years.
Although I don' think I would recommend them (older technology) We have 8 Leviton VRPØ3-1LW dimmers that were purchased between 2016 and 2018 with no failures to date. We are using them for "ambience" lighting so they are on about 4 hours every day.
UPDATE: I found some Leviton with Z-Wave plus radio's. Based on my current experience I would try them if I needed more. They are a little big but with the plug coming out the bottom instead of the front they sit fine behind furniture etc. see here
Two of them had table lamps with 13W LED dumb bulbs in them. The one that just died (became unresponsive) had a small 4 channel audio mixer plugged into it.
I have about 6. Same plugs various names. 2-3 have gone bad . Ie either just click or do nothing. But they are basically only ones that fit in outdoor boxes.
I had 8 of the eWeLink plugs, including some CMARS, I lost a couple of them during an ice storm/power outage last winter. I have lost another couple since then. I have been replacing them with Third Reality 15 amp plugs. So far, they have been great.
The plugs are available either with or without power monitoring. If you do not need power monitoring, get the plugs without it as they generate less traffic on the mesh.
And another died overnight. Thankfully I picked up a 4 pack of the Third Reality plugs during the Amazon Prime event two days ago. Time to exorcize the demons of CMARS.