That's exactly the point: this is the right way to experiment new coins, and to progressively add new features to Bitcoin without the need to risk to buy some stupid scamcoin.
Sort of. I certainly view it as one potentially right way to experiment with expanding the functionality of Bitcoin.
I think that we will see a lot of hate toward sidechains from all the altcoiners, and you will know why: sidechains take from them the opportunity to make some profit pumping new coins.
I agree with you there will be hate. I disagree with that reaction even though also I don't agree with the hate directed
at alts.
I'm not sure about your second sentence though. What is your explanation for why the largest alt has (and a few of the top alts have) nothing to do with features?