One of the most important reasons is that the social groups we contact have changed. From primary school students to college students, everyone often chats in the Q group. But after graduation, I worked, and most people I know use WeChat. In order to better integrate into the circle, I had to switch from QQ to WeChat.
The last reason is that QQ is more entertaining and WeChat is more commercial. Looking at the market, most supermarkets use WeChat to pay where there is QQ payment, so most of us have to spend our own money out of society. At this time, the role of WeChat came out.
For this change, it is actually a little sad. From QQ to WeChat, it is like our growth, from immaturity to maturity. Of course, some people have not given up QQ, and both software are in use. After all, one is to recall the present, and memories are often beautiful. QQ also represents the youth of our generation, which contains many youthful feelings that we are unwilling to give up.