Beef is already too expensive for most people. Americans are probably the exception but I can assure you that most Europeans do not have beef heavy diets. Even culturally, pork (and now chicken) were the proteins of choice.
Subbed pork, poultry, and eggs for the most part, some fish but that's not particularly cheap either.
Beef is too expensive for many Europeans because GDP per capita/standards of living are declining in many European countries. People in East Asia, the Middle East, Oceania and South America still eat plenty of beef too.