I am thinking of huge endeavors like building an asic or huge complex systems like virtual machines. Not always a comparable system for Repetition is available

I am thinking of huge endeavors like building an asic or huge complex systems like virtual machines. Not always a comparable system for Repetition is available and must be built from scratch. Affording such rebuilds require huge sums. Of course nobody does consider others not capable enough. Its just that there are not so many people experienced enough to build certain systems in a decent amount of time.