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RE: Steemit Crypto Academy Contest / S2W3 - Blockchain in our lives.
This is a very nice post. I believe that you did your research for this post. As you mentioned, one of the disadvantage of Blockchain is that there's little or no cross communication.
However, there are some Blockchain platforms that have developed this feature.
Good luck in the contest
Yes, cross-communication is a problem in some blockchains.
I wrote about this in the post as some of the blockchains have the functionality.