Isn't it about time carb heaters were standard. I had them fitted over 12 years ago which consisted of a water jacket (engine was water cooled) but I am sure even then electric heaters were available.
Still did the carb checks but it did work and I never experienced carb icing with them.
2015 and aircraft engines are still prone to icing? The one thing that results in ef and the one thing that can be cured.
Unless you have an injected engine when you cease worrying.