I had been having the same feeling, and the same doubts. Then I went on a trip abroad and there the Mars bar tasted _exactly_ how I remember it from my childhoo

I had been having the same feeling, and the same doubts. Then I went on a trip abroad and there the Mars bar tasted _exactly_ how I remember it from my childhood (I think it was in Romania, but I'm not sure). So I think the recipes are definitely adjusted over time, and depending on the local market.