Pork fattening concentrate - what's the best??

Hello! I have been fattening pigs for about 10 years. During this period of time, depending on the economic situation, I used various types of fattening methods: from full batch, through concentrates to premixes. A lot could be written about economic effects, but I will try to stress it in one sentence It is only my opinion based on personal experience and everyone may have a different opinion on this matter. I believe that the use of concentrates gives the best results, i.e. my own contribution and results. with different knowledge and I will comment on this issue after hearing your opinions. Please, do comment on this topic.