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mikey100 said..Well.. That was a popular subject.

Actually, it
Is quite and interesting subject Mikey! I read it this morning but had so many thoughts about it I needed to think about it a bit more to sort it out.

Not so sure about the 'Momentum' bit, but pretty much everything else you said is what I would have said.
One other aspect is that suddenly throwing 8-10Kg of weight on your chest and back, changes your balance quite significantly. To compensate, I found I had to work my arm and core muscles a lot harder, and it wore me out in half the time, even when I was a lot younger and fitter. From that aspect, it's wise to wear some weights in lighter wind practice to get used to it, and work your way up to heavier weights as you adapt, and you core training in the Gym progresses.

Luderitz was indeed a different thing as there is no sailing or walking back upwind. Those two things are remarkably more energy sapping with weight on.
My last thought is that, yes, you can gain some stability and power, and may add a Knot or two to your speed if you get the right gust, but the big guys can do exactly the same thing (and do!) so you end up just as far behind them, just at slightly faster speeds.

For me, these days, it's just not worth putting my body and back at risk, and better for me to just try and do a few more runs to catch a better gust.

YMMV