Hello friend greetings to you. Hope are having good time there.

Sidechain is associated or attached to the main Blockchain, which help to increase the scalability of the main Blockchain. Agree with you. Another function of side chain is that, it decreases the burden on main Blockchain, also increases the transaction speed and lower the transaction fee too.

Steemit also have a project on it's side chain and it is HIVE. It is made on Steemit side chain. The function of HIVE is to do faster transaction, governance mechanism and content reward.

Over all you have done a great job. The blog is awesome to read. Thanks for such a details blog.

I wish you very best of luck here in the contest.