Yes, meta-tracing really works! On the other hand, I think it is somewhat deterimental to the success of the idea of meta-tracing that really the only working

Yes, meta-tracing really works! On the other hand, I think it is somewhat deterimental to the success of the idea of meta-tracing that really the only working production grade implementation of the idea is RPython. RPython is very idiosyncratic, to say the least. I think a good implementation of meta-tracing on boring technology (say, C++) would greatly help popularize the idea.