wouldn't it be the easiest way to just create a bitcoin clone with it as proof of concept?
sidechains seems too much in the future
Why create a clone when this can be tested in a bitcoin testnet and than rolled out to be tested in a sidechain where we can test 2 important upgrades simultaneously?
Creating an alt to test this feature doesn't seem necessary and could be a distraction, but developers are free to use the info in an alt if they like.