Hello friend,
Greetings.

I like the fact that you explained in an easy and clear terms. You must be a good teacher.

One disadvantages of Blockchain is the high consumption of energy as alot of them makes use of the proof of work… but in recent times we have seen some blockchain technology that has implemented the proof of stake which has helped to reduce the energy consumption level. Blockchain has and will continue to impact lives, all we need to do is exercise patience, and expect review and modifications on some of the disadvantages of Blockchain. Kudos!