Could you theoretically say why EURISKO didn't RSI?
Sure. In fact, some of the Lenat quotes on LW even tell you why.
As a hack to defeat 'parasitic' heuristics, Lent (& co.?) put into Eurisko a 'protected kernel' which couldn't be modified. This core was not good enough to get everything going, dooming Eurisko from a seed AI perspective, and the heuristics never got anywhere near the point they could bypass the kernel. Eurisko was inherently self-limited.
The Open Thread posted at the beginning of the month has gotten really, really big, so I've gone ahead and made another one. Post your new discussions here!
This thread is for the discussion of Less Wrong topics that have not appeared in recent posts. If a discussion gets unwieldy, celebrate by turning it into a top-level post.