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Because it is written in Rust, I presume.

One of Python's use cases is as an embedded extention language. Used in tons of apps that way...

Pity it wasn't originally written in Python. /s

Well, originally others were.

Then somebody did it in Rust, where it's faster.

There's still a tradeoff: not as dynamic.

/s

Sublime Text and QGis are both written in C++ and extensible in python.