I have seen MANY people install it on company hardware because it's tiring to have long chats on a 5" screen and it's hard to send/receive files through a phone. Many hardware providers send/receive contracts and even firmware hex files over WeChat (WTF, I know, but they do) so you're forced to use it for work if you are in the hardware industry, but for most people Tencent doesn't let you use it from a desktop without a native app. And they try to brainwash you into thinking it's for your own "account safety". BS.
Also, Alibaba's conferencing client. If you even have a meeting with anyone at Alibaba, they send you a proprietary desktop client to use for the meeting. More people need to learn to stand up and say no to this. From a corporate executive level, proprietary conferencing apps need to be banned on company-owned machines.
What they should be doing is straight-up WebRTC running in a web browser, which works great, and which will work in China as long as you set up signalling servers there.
That is insane!