What I meant was that phrase in the docs to for/when:

On exit from the when  block, there is an implicit next.

so you can use a simple if where you wanted to write  when () { ...; continue} and vice versa you can write when where you wanted to write if () {...; next} ! (as long you don't need the implicit smart match)

In other words: This next in your code

...
    say "  After when /abc/";
    when (/def/) {say "    Got 'def'"; next;}
    say "  After when /def/";
...
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is a tautology...