For a monolith it's having to run the entire platform locally to fix one bug.
That includes databases, caching, auth, ML models, mock API endpoints etc all pre-populated with sample data then the actual application which for complex, JVM based ones can often fail to launch if there isn't enough memory to pre-allocate.
Many systems I have worked on all of that would simply not fit on a 16GB MBP.
What are some examples of monolith components that couldn’t be run locally?
Im guessing third-party integrations, but perhaps there are other things.