alt Hacker NewsIn C3 it's complicated. On one hand the lack of goto means defers are more straightforward, but the biggest problem is that once you have a different way to handle cleanup and you have labelled break/continue, and you have the nextcase to jump to arbitrary cases, there's very little left for goto to do.
It is limited to when you want to jump from within an if statement out across some statements and run the remaining code. It saves one level of indentation, but being so rare, it's hard to justify the complexity.
I keep going back and see if I find some usecase that could motivate putting goto back in but it so far nothing. The "nextcase" allows C3 to express arbitrary jumps back and forth, although not as straightforward as goto.
Looking at my own code one case I wouldn't get with defer and better switch is avoiding a flag pattern.
For example when you iterate over a block and check if positions are 0 (+ do some work) and once you encounter a non zero you jump to a different "non-empty" section but if it's zeros to the end you jump over non-empty to go to end section. Without goto you need to set a flag and add another conditional there.
Other than that what you mentioned: flatting the if structure is nice. When you have a few simple cases and then a complicated one and a finishing session at the end it's just cleaner and easier to read with goto. It could be handled with a switch statement but not everything is "switchable" and the way most people write it it's another 2 indentation levels (1 with a convention of not indenting cases but I see C3 docs avoid it).
I get it's rare but goto (other than error handling) is rare and I don't think people have a tendency to abuse it. If anything people abuse "structured" construct building an arrow pattern with multiple indentation levels for no good reason.