The problem that me, and seemingly a couple others, have with Cypherdoc's concerns is that most of them boil down to the creation of altcoins, something that sidechains did not introduce and do little to enable. I hope you have come to understand this part because the accusation that you make of SC proponents being "unreasonable" can equally be applied to most, if not all, of the SC opponents in this thread.
You seem to be a reasonable person who has a great ability to distill his ideas in thoughtful and concise manners. Maybe you want to share with us notable weaknesses of the 2wp and what considerable risks you can foresee?
not having examined the mechanism and trusting it does what it says on the box I see the positives as you do, but with 1 exception, a
side-blockchain crypto this presents some concerns that haven't been effectively analised, thinking
side-blockchain crypto will be as effective as Altcoins today is an unbaked projection.
I't would be great the have some economic studies done on these effects, Bitcoin is as much an economic prototypical as it is a computer algorithm.