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Thanks. Will check the video but this is strange. The limit for transaction mentioned is 1.7mn in WP but you say shards limit is 2.1bn. What will rest of shards do.
Secondly, WP says the block limit on for chain is 8MB and the header size for one shard's block will be 128mb. That comes at about 3k what's accommodated in one block. How will they manage 2.1bn shards?

oh...ok.thanks mate