NTCT/PTCT gates were the first pieces of electronics used in TPT. id:4260 was made out of NTCT/PTCT gates. Pretty awesome! But as NoVIce said, if you want these to be useful in modern times, where things are faster, you shouldn't rely on NTCT/PTCT gates
they are good but please don't use NTCT/PTCT as they tend to cool down slowly and cannot be used in fast electronics.