3. The system were full of bugs. The client I installed never ran properly more than 24 hours.
I had to delete the .nxt or re-download all client and block chain files to fetch the latest block info every time I restart computer.
And the block chain update progress always got stuck.
Not to saying the super user with huge amount of coins or negative number of coins.
Bitcoin had bugs once you know. It's years old now.
Please note, NXT is built on a totally new codebase with different concepts. Do not compare it to Bitcoin clones which have only a few tweaks or deviations from the Bitcoin codebase.