It was released in July 2019. Performance dropped and reboots still occur.
Suggest you play it safe and get routers supported by OpenWrt.
OpenWrt appears to have overall better stability, performance and features.
As Charwinger21 already mentioned, the popular developer - Kong has left dd-wrt and now works on routers with OpenWrt firmware.
Cons of OpenWrt, the user interface is not as refined as a typical consumer/dd-wrt router.