Surely if your monolith codebase is good enough, migrations will be easy too. And a well architected system can be run on a single machine. If you don't believe

Surely if your monolith codebase is good enough, migrations will be easy too. And a well architected system can be run on a single machine. If you don't believe me, try running windows 95 on your machine. These are True Scotsman fallacies that devs often use to justify whatever paradigm/philosophy they believe in. Most code in the wild is not perfectly designed or if it is, it doesn't stay so for long. Paradigms that rely on optimal conditions to work decently aren't universally useful imo. If your car only works on pristine, smooth roads, it's not a good car, no matter how many cool features it has or how fast you can ride it.