I think the real point of sidechains is you can directly deploy them then use them as isolated experimental chains to play around with and do all kinds of new and maybe weird stuff without the risks of screwing up the main blockchain, why even try on testnet then? why not try on a sidechain?
Sidechains are altcoins essentially, just like you can deploy a trial altcoin as an isolated experiment, I don't see the fuss about sidechains. 
Topic: Sidechains on Testnet (Read 401 times)
I think the real point of sidechains is you can directly deploy them then use them as isolated experimental chains to play around with and do all kinds of new and maybe weird stuff without the risks of screwing up the main blockchain, why even try on testnet then? why not try on a sidechain?
and?
Testnet can be overcome pretty easily with a single ASIC according to Greg Maxwell.
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