I disagree on both accounts, even in manufacturing scaling has it's limits. Being able to mass produce can't infinitely reduce costs, sooner of later you'll hit

I disagree on both accounts, even in manufacturing scaling has it's limits. Being able to mass produce can't infinitely reduce costs, sooner of later you'll hit a barrier (cost of natural or human resource) which can't be reduced. Secondly no-one has permanent dominance in anything, how many market leaders from 100 years ago are still leaders today ? - it's purely a case of how long you can hold dominance for.