Earlier quoted context omitted.
What's wrong with current generation DHT? They work. They are secure (depending on how you define that). They are reliable. Why would we want to replace them?
Anyone with mediocre skills can take it down; ( And more ) that's the problem. I'd rather not mention the specifics because that might give people ideas but they can be found in academic papers.
The obvious question here is - if its so easy, why hasn't anyone done so? When was the last time bit torrent's DHT went down? As far as i know never.
It should be noted that current generation DHTs aren't the same as the original and do have some mitigations from certain attacks.