Python at ICPC world finals 2017 - Codeforces (original) (raw)
I don't know about their consideration, but sometimes there are problems that can be solved in likely 10 ~ 30 lines of Python, and can still pass all testcases even it is 50~100x slower than properly implemented C++ ones.
For these challenges writing "dirty inefficient but slightly easier to code" C++ solutions made me sick, not to mention OhGodICannotEvenReturnEarlierHowToEfficientlySolveProblemD.java.
And if this decision spreads, this can discourage problem setters of regional contest from making "can you implement a quick and dirty json.loads in C++" style problems (which are boring).