A very good point that is ideed the ultimate answer to my question by
guiding to Special Backtracking Control Verbs.
It states that (*FAIL) can be used to force the engine into backtracking
and that this is equivalent to (?!).
So version 2 and yours are basically the same and both are guaranteed to work.
The trickery from version 3 is not needed.
So in the end it is "use" and not "abuse".
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