CFI,
I am with DLV.
I think that we are all talking only of final, although the base turn is often where the transition in techniques occurs.
If the aeroplane is slow enough, light enough and is propellor driven, your technique will not produce much difference in outcome, mainly because the responses to attitude changes can be relatively slow and the response to power changes can be quite dramatic. If the aeroplane is fast, heavy, relatively low drag and jet powered, your technique invariably leads to PIOs and unstable approaches - simply because the results of attitude changes occur quickly and the response to power changes can be relatively slow.
Like so many of the really good things in life, once you have done it, you won't go back! Having said that, PnP (I like that!) only works within a defined glidepath range similar to an ILS glideslope - once outside it, then you must fly back into the window using attitude for airspeed and power for rate of climb/descent and then resume controlling your flight path vector to impact the ground at your point of choosing.
Please don't hide it from them once they have conquered the basics - the absence of the technique later on cancause them considerable and unnecessary heartache.
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Stay Alive,
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