sigh, YOU again...

you may use it for

1. easily leaving deeply nested recursions, without the need to return step by step

    perl -e '
   my $x; sub rec { goto STOP if ++$x>10; print $x; rec()};rec();STOP:' 
   12345678910
   [download]

2. easily defining specific labels and jump-commands in DSLs (Domain Specific Languages) and encapsulating all the logic within the subs.

   For instance if you want to emulate and/or compile an assembler language you can easily implement it as valid perl-code then easily using Perl as macro language:

   use Assembler::6502;     # fictitious module 
                            # implementing Mnemonics as subs
    
   MARK:      LDX 10;
              ADD 3;
    
              macro1();     # Perl sub to include/call mnemonics 
    
              JSR SUB2;
              JMP MARK;
    
   SUB2:      ...
              ...
              RET
   [download]

serious enough?

UPDATE: added examples