Clearly "chill" mode is very controversial to some, judging my my very innocuous remark from 15 months ago causing someone to get very annoyed by it all this time later. Very bizarre, and strangely not the first time something completely innocuous has attracted some ire.
FWIW, I tried chill mode before my wife first drove the car, as she was a bit nervous and I wanted to reassure her. Seemed OK, perhaps useful for those just getting used to driving an EV for the first time, but she quickly got used to it and, like me, just left it in the normal mode. The accelerator seems easy to modulate on the Model 3, IMHO, plus it seems reassuring to have that greater responsiveness available if needed.