Every large company building mission critical systems, maybe. Resilient systems take longer to build, and thus are more costly. It is not always wise to spend

Every large company building mission critical systems, maybe. Resilient systems take longer to build, and thus are more costly. It is not always wise to spend that much resources on this for, say, a startup. After a startup is crushing it, then maybe they can start rewriting any brittle monolithic systems into something more resilient.