[dexwell]

I think developers prefer writing code they understand over trying to understand someone else's code. I've taken a look at Telegram's codebase, and replacing the Telegram API with the Matrix API is way harder than it sounds. Telegram wasn't developed with this flexibility in mind, and the Matrix SDK has its own way of doing things.

[devxpy]

This. I often end up writing my own libraries because of this reason. Kinda hard to get into other people's minds...