Ok @imaginary_username, @ShadowOfHarbringer, and @freetrader, I call you out.
If you are so certain of a sidechain solution, I will modify this BUIP to allocate a maximum spend 50000 USD (billed hourly at the same rate that BU pays me) towards the implementation, CHIP process and deployment into BCH of such a feature. This is FIVE TIMES what is allocated towards this experimental cryptocurrency, and should be significantly more than needed if this technology is as mature as you suggest.
You can choose the engineer to implement it and manage the process. One caveat: As required by the BU Articles, the work must be done in the Bitcoin Unlimited full node. But of course the BU node and the BCHN node are similar enough that you can easily port from one to the other.
In return the three of you will vote for this BUIP.
Surely adding the ability to have sidechains in BCH will be a massive advantage, far exceeding any damage a tiny new crypto will cause – most likely I won’t even be able to launch a genesis block before you’ve delivered this.
If you don’t take this challenge, you demonstrate that your arguments are not in good faith and that you won’t even stand by them.