As it happens, there were some (now very obscure) attempts to replicate it. They failed. I cover (and jailbreak) them in my criticism of Mouse Utopia: https://w

As it happens, there were some (now very obscure) attempts to replicate it. They failed. I cover (and jailbreak) them in my criticism of Mouse Utopia: https://www.gwern.net/Mouse-Utopia https://www.gwern.net/Mouse-Utopia OP is a bad writeup. He should be ashamed to write such an uncritical piece which says nothing you wouldn't find in either the Down The Rabbithole YouTube video (which seems to be patient zero for the resurrection of the Mouse Utopia myth) or the Wikipedia entry. The problem with Mouse Utopia is not that it has been interpreted in different ways by later pundits, but that it's probably bullshit to begin with. (How thoughtless do you have to be to note that it was the 25th experiment in a very long series of them before/after the behavioral sink experiment, and then not immediately wonder WTF happened in the >24 other experiments and then wonder why you can't find any information about any of them?)