Down further they say something about how they'll ask the community what the acceptable memory usage increase will be. In other words, they might reduce it by say 15%, but not anywhere near the JIT-less levels, and call it a day. I suppose you always have the option to compile python as --without-jit...

So, you'd accept unladen as the official JIT based on the vague promise of improving its glaring issues sometime in the future? Does that give it the right to be in a "blessed" repo?

I propose my own python implementation for acceptance into the source tree. Right now, it's a single empty file (but I've got lots of ideas!). I'll even consider it a blocking issue if it achieves less than 10x speedup using half as much memory.