Why? Grok is nothing but another LLM and LLMs have proven to be quite the productivity booster. You can see it this way: previously we only knew how to use supercomputers to crunch numbers to simulate stuff like fluid dynamics, which is useful, but only in a limited domain. Now we can use supercomputers to "simulate" the workflows of 95% of the office drones worldwide (us included). I think that's a MASSIVE paradigm changing leap forward.