Office Space jokes aside, you shouldn't. I think it's very important to be yourself and refuse to let people pressure you into changing for no good reason. I am not an em dash user myself, as it's a pain to generate when there's no key on the keyboard for it. But if I were, you best believe I wouldn't change my style one bit. People can accuse me of being an LLM if they wish, but that's no skin off my back.
It's like being named Michael Bolton and watching a singer rise in fame named Michael Bolton.
Why should I change my style?