Descriptors underpin some common language features like method calls (that's how `self` gets bound), properties etc. You can still do it by special casing all t

Descriptors underpin some common language features like method calls (that's how `self` gets bound), properties etc. You can still do it by special casing all those, and making sure that the way you implement all those primitives works exactly as if it used descriptors, sure. But at this point it's not exactly a simple JIT anymore.