David Weaver
I'm sure at some point, you're trimming small or narrow parts, etc, and handling the weight of one of those heavy planes isn't going to be what you're looking for.

I think it's a beginner's advantage in getting a plane started and keeping it in the cut, but using the cap iron kind of cancels it out.

The whole thing of taking a 4 or 5 and spinning it around the knob and then pulling it back toward you is a no-no with a smoother that weighs a whole bunch more.