Needless to say, but I don't use vim or emacs. My editor can do that too, but it's not the point.

The subtlety of this is that it comments/uncomments a block. A block as defined by the language.

Not some manually chosen grouping of an artificial concept of 'lines';

Your point that it could be overlooked is valid, but if a block is going to be commented out (semi-)permenantly, then I would either put it into a pod comment, or physically remove it. The use of being able to comment out a block in a block-strucured language would be to test it's effect in the short term. A quick "what if" check whilst debugging. Easy to do and undo.

If, having tried the idea out, you decided to make it semi-permenant, then you could go back and use a macro to make it more distinctive.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
The "good enough" maybe good enough for the now, and perfection maybe unobtainable, but that should not preclude us from striving for perfection, when time, circumstance or desire allow.

In reply to Re^3: More than One Line Comment by BrowserUk
in thread More than One Line Comment by gopalr

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