Professional Cat Confuser
don't hold to much with the idea of heated gear, with my luck it'll fail when i really need it.
As a man who has done LD riding both under the "layer method" you describe and also with heated gear, I can tell you with certainty that there is no substitute. No amount of passive heat retention will ever compare to the active addition of warmth.
You're entitled to your viewpoint, though, so continue with passive retention if that meets your needs. But as a guy who rides year-round and has done it both ways, I invite you to try heated gear. I've known of many riders who've switched to heated gear, but I've never known anyone who tried it, felt the benefits firsthand, and decided to go back.