I do agree that a lot of seqeunces pages would benefit a lot from having discussion of previous work or at least stating what these ideas are called in the mainstream, but I feel Yudkowskys neologisms are just… better. Among the examples of similar concepts you mentioned, I definitely felt Yudkowsky was hinting at them with the whole dimensions thing, but I think “thingspace” is still a useful word and not even that complicated; if it was said in a conversation with someone familiar with ANNs I feel they would get what it meant. (Unlike a lot of other Yudkowskisms usually parroted around here, however...)
I do agree that a lot of seqeunces pages would benefit a lot from having discussion of previous work or at least stating what these ideas are called in the mainstream, but I feel Yudkowskys neologisms are just… better. Among the examples of similar concepts you mentioned, I definitely felt Yudkowsky was hinting at them with the whole dimensions thing, but I think “thingspace” is still a useful word and not even that complicated; if it was said in a conversation with someone familiar with ANNs I feel they would get what it meant. (Unlike a lot of other Yudkowskisms usually parroted around here, however...)