Nxt is very close but has the following downsides:
1) more missed blocks
2) no dividends to share holders
3) slower block production
4) random individuals can manipulate the transactions with ease... nothing on the line when their turn comes up.
5) more centralized, only those who choose to participate can exercise their shareholder influence
- you must risk your public keys by having your wallet unlocked
- gaining 51% of the active stake is much easier with Nxt because so much is inactive.
This info is a little bit outdated. For example, u don't have to risk ur private keys coz u can delegate ur mining power to an empty account -
https://nxtforum.org/news-and-announcements/nrs-releases/msg8982/#msg8982. The last point about gaining 51% will become irrelevant after people run pools and small fish delegate their power to professional miners.
Also, what does "more missed blocks" mean? If it's about the bug that didn't allow to sign blocks then it's already fixed. Slower block production - 1 min between blocks doesn't look slow. Transaction manipulation - I don't get it, do u mean that miners may refuse to include some transactions? If yes, then it's not a problem IMO, Bitcoin miners include even non-prioritized transactions with 0 fee, why Nxt miners will do opposite?