It is still relatively simple because the conversion between Pathlib<->str is literally one method call (from pathlib, just call `str(pathlib_object)`, from string, just call `pathlib.Path(str_object)`.

I know this because I started a project using only strings and `os.path`, however when testing it started to become complicate to mock the correct paths so in tests I use `pathlib` (with conversions back to string when I finish path manipulation) and the code still works.