It writes my most boring emails so that I can save a scrap of mental energy for parenting properly after work. Even though my WPM ranges between 70-90 with >98% accuracy, I would rather save some of that mental energy to respond more thoughtfully as a dad.
Of note, I do not give one cold shit about GPT's "growth". It's a linguistic power tool that needs to be carefully handled if you use it for any valuable work.