“After creating PEP 836 (“JIT Go Brrr: The Path to a Supported JIT Compiler for CPython”) to try to meet the council’s request, and after months of discussion, the JIT maintainers have withdrawn the PEP.”
CPython shipped a JIT in 3.13 without the standards-track PEP a feature that size normally needs. The steering council finally asked for one this June. The maintainers wrote it, argued for months, then withdrew it. Two years of work leaves CPython over process debt nobody paid when the code went in.