In the past you run your whole application as one piece on your machine, you could easily set a simple breakpoint and be done with it, now you have many interde

In the past you run your whole application as one piece on your machine, you could easily set a simple breakpoint and be done with it, now you have many interdependent components (microservices, 3rd party APIs), stuff running in the browser, stuff running in remote databases. It's like looking for a nail in a haystack. Even worse on production, you need to log every single call everywhere just in case you ever need to trace which random component caused that weird issue the client is complaining about.