It is highly relevant because we in industry are the ones who actually have to work with and scale all these needlessly slow piece of shit language implementati

It is highly relevant because we in industry are the ones who actually have to work with and scale all these needlessly slow piece of shit language implementations. Implementations that get a pass because nobody can be bothered to have this conversation. Languages that are dynamic or good for scripting, rapid prototyping or whatever the hook is do not need to be implemented using slow and inefficient techniques and shouldn't get a pass for it. Similarly terrible languages shouldn't get a pass for being terrible just because they happen to have fast implementations. It's precisely in academia where it is a worthless nondistinction, there a language doesn't even need to be implemented to be studied. For instance lambda calculus predates the programmable computer.