Complex sentence: Much discussion took place on whether to remove the GIL from CPython, even after the rejection of the "free threading" patches on CPython from Greg Stein which effectively replaced GIL with fine-grained locking.
Split into simpler sentences: Much discussion took place on whether to remove the GIL from CPython. A set of "free threading" patches to CPython was submitted by from Greg Stein, which effectively replaced GIL with fine-grained locking.