So, I don't know a whole lot about the processor design/manufacturing process. If the fabricator (say, Intel) omitted many of these odd legacy and unused instru

So, I don't know a whole lot about the processor design/manufacturing process. If the fabricator (say, Intel) omitted many of these odd legacy and unused instructions, how would it affect the production process? Would Intel be able to meet the smaller die sizes they're currently having trouble with? Would it make the processors any less expensive to produce at scale (all other things equal)?