To understand the V3.1’s popularity, you have to look at the silicon. The Rockchip RK3229 was the workhorse of the budget TV box market several years ago. A Quad-core Cortex-A7 processor paired with a Mali-450 GPU. It was cheap, it ran relatively cool, and it was ubiquitous.
It appears you're referring to a firmware for a specific device, likely a TV box or a similar embedded system. Let's break down the components: mxq rk3229 emcp v31 firmware top
This means the firmware used a different Wi-Fi driver (e.g., RTL8723 vs. ESP8089). You must find a firmware matching your specific Wi-Fi chip model. To understand the V3