That is a very good article. Kudos to the team! 

As mentioned, '51% attacks' could be a threat to Blockchain. But with the rise of many Proof of Stake blockchains, this happens to be less dangerous than before. With a PoS, the attacker would need to obtain 51% of the cryptocurrency to carry out a 51% attack. The proof of stake avoids this ‘tragedy’ by making it disadvantageous for a miner with a 51% stake in a cryptocurrency to attack the network.

I am also very impressed by this information:

This news shows us how far blockchain adoption has gone. Teaming up with the government is a huge step! Let's hope these kinds of partnerships will make blockchain become more friendly to our daily use, and when speaking of blockchain, people will have more things to discuss than just cryptocurrency.

People still love doing things in old-fashion way despite there is a lot of advantage.
To cut off the middle man services is the most well known, people could save a lot of money but still dont want this blockchain to be around.
Do you know why?
It is because the environment tell them it is hard to understand especially for the elderly , complicated.
The society rejected it , they are not ready for the advanced technology to be used in our daily life.
At some place maybe this technology warm welcomed but majority still not ready.

In regards to data modification (data reorg?),
I doubt you changed hashed data and the changed data will still be accepted by the network as unmodified. That is why decentralization, transparency, immutablity/hashing of data make Blockchain great

Advantages mentioned above are really helpful and I believe blockchain is one of the best invention for this century.
There are lot of companies starting to use blockchain, they starting to adopt this technology.
Bitcoin is one of the best product of blockchain for me.
We really can't avoid disadvantages, everything is not perfect.

It is really a good idea that blockchain technology can trace most of the transactions so that when scammers attack someone's account then the authorities can actually trace them immediately. That's very important for me because there are a lot of people who are losing their assets instantly due to ignorance. Blockchain technology is really essential right now as we are approaching more in a digital age and we need to adapt as we go on.

Yep, this is detailed enough but it should include how it can transform the sectors and how such sectors can shift from their existing models to the blockchain ones. Still, the article is pretty informational.

I think one of the greatest advantage of Blockchain is decentralization, because this paved way peer-to-peer system of doing things like payment transaction, this peer-to-peer system then leads to transparency, accountability and reliability; hence this is why a truly blockchain platform is better than others. The fact is, there are many blockchain platforms which claims to be decentralized but in reality they aren't, rather they are just using the term "decentralization" to drive hype within their platforms.
In the case of disadvantages, I don't think data modification is a disadvantage, in fact it is what make a blockchain system unique and different from traditional systems. Blockchain records is immutable meaning it can't be tampered with and this is what brings about trust, unlike in  other systems where data can be modified at will, hence bringing about data manipulation. Other disadvantages like 51% attack is yet to happen in most blockchain platforms which means they are really secured.
Therefore, in my own understanding, Blockchain advantages is far more greater than its disadvantages.

Blockchain has its own disadvantages like all of the things that coexist with us. However, the flaws of fiat is much scarier than in Blockhain. Here are the list according to this Article

- Inequality of Income
- Growth of Monopolies
- Over-Capitalization
- Misuse of Capital
- Hoarding
- Black Money
- Political Instability

The security of our funds, whether it is in Blockhain or in banks, it should be our responsibility on how we are going to secure it to avoid getting hacked or whatsoever.