A pilot can use either technique. Depending on the pilot, the aircraft,
and the approach, there are positives and negatives to using dive and
drive vs. stabilized constant descent technique.

One thing you frequently hear is that you could IMMEDIATELY descend
(helicopter) to the next altitude once you pass the waypoint. NOT true.
There is a maximum decent allowed. I don't know what it is, and it is
quite steep, but it's not vertical.

I learned in my training to do constant descents. Figure a VSI that
will work and use it all the way down. I don't like having to make
adjustments to my airplane on the way down. Pick one vertcal rate and
stick to it all the way in. The disadvantage is, I might have more
tailwind and when I break out the airport might be behind me. I guess
I'd rather take that risk vs the risks inherent in the dive and drive
method. Also, this way, my approaches are all basically the same, ILS
or non-precision. Configure the airplane for the desent rate and keep
that all the way in until I break out. If you figure it out right, with
GPS, using groundspeed, you always know where you are.