This shouldn't be limited logging.
In unstable application scene, file should be append and then close immediately to avoid breaking filesystem (e.g. inode is not updated timely). Such as main.py file in MicroPython development board, user may disconnect USB or press reset at anytime without ejecting disk. Or in IVI system, some embedded devices, record should be appended immediately.

And if path.write(append=) is not common enough, then what's about built-in function open()? What's the purpose of adding read/write functions to pathlib.Path?