I don’t recall seeing any of those threads. Could you please post a link to a thread where many people discuss it is bad for the engine to let it warm up in cold weather.Yes, I do not know. Just many people on here during the winter discussing how idling this engine in cold weather is very bad for it. Somone posted a video of Toyota mechanic I believe explaining how the oil does not fully coat the pistons or something like that. I am no expert. But I did reduce the idling time and moved off the driveway staying at slower speeds. Whatever I read on here convinced me to follow the advice. Again this was for very cold temps