Again, we have a very simple answer, to a question with multiple qualifiers.
No body does Normal phase HPLC. It uses awful solvents, is poorly reproducible, and has no advantages against reverse phase.
Now, that statement I just made should come with any of a number of qualifiers. Yes, normal phase separation is important, even necessary, for some HPLC analysis. And with proper work, is a perfectly reproducible method, for QC purposes, even cGMP QC analysis.
But reverse phase is so well known, and so easily done, that no one will just flip for the fun of it, as you've described. That's so far outside of contemporary HPLC analysis, I don't know where to begin to say how its wrong.
Hey, did you hear, in some nations, people drive on the left instead of the right? Let's all switch, tomorrow. It'll be fine. I'll seed a world-wide tweet tonight.