> For instance, I don't really see a need to have the same app do chat and payment (in fact, I'd prefer if they didn't).
You not seeing a need and them meeting one that clearly exists have nothing to do with each other.
> What about WeChat is particularly innovative, other than just bundling a lot of different functionality into one big app?
Making it actually work well enough for millions of people to use it. I can't think of anyone else who's succeeded at that and there are plenty that failed miserably to build that type of "kitchen sink" platform.
You not seeing a need and them meeting one that clearly exists have nothing to do with each other.
> What about WeChat is particularly innovative, other than just bundling a lot of different functionality into one big app?
Making it actually work well enough for millions of people to use it. I can't think of anyone else who's succeeded at that and there are plenty that failed miserably to build that type of "kitchen sink" platform.