By the time they switch ton pypy they already have too many C Extensions that is not compatible with pypy at that time and instead of improving pypy they try

By the time they switch ton pypy they already have too many C Extensions that is not compatible with pypy at that time and instead of improving pypy they try to develop their own llvm based jit python and they failed doing that. They should had ported those into CFFI or just help pypy improve context support. But NIH much and they built their own pypy alternative for years and failed