Hehe, guess
why these places have been abandoned ?
It's because they had succumbed to being the complete Anarchy mudholes they were during their peak times
The "old worlds" have been the prime dark spot on the proverbial incompetence of the Alliance (or the systemic failure of any System Security concept in the entire Game).
They've been the core demonstrator of the insane imbalances of PvP Ganking (which typically hovers around 1:1000 and can easily reach far more ludicrous levels).
They've demonstrated what happens when rampant crime, abuse and terrorism goes entirely unpunished and uncountered by any means.
...and essentially, places like Lave have merely proven the long-predicted side-effects of letting this toxic chaos run along completely unattended.
During the peak times, you'd have to be completely crazy to run into them i.e. in a Type-7 or Type-9.
They had become zero-security NoGo areas. That's what happened.
Now they're deserted and the core reasons for that all happily remain in place to this date. Plus, alot of very good or better alternatives to make Credits have developed along the way.
I know my opinion isn't popular - but for all I care those Systems could all get sucked into a supermassive Black Hole or burn in a Supernova. They'd be absolutely no loss.
btw, that "spirit of Lave" you can still experience during some Community Goals at the right times. Once in a while they turn into similar meat-grinders.
PS.
I kinda liked Lave and Leesti nonetheless.
Everything that was wrong the Game in terms of cheats, exploits, abuse, loopholes, complete lack of balancing or complete lack of logical action & reaction mechanics... it was all there for everyone to see, all in one place.
Best place to test Shields against afterburner-ramming Orcas or pre-nerf Dumbfire Missiles I ever saw.
Disclaimer :
I actually visited the Lave cluster today to pick up some rares. Haven't done it in a very long time and just needed some stuff for a special occasion coming up.
It felt good to see these places dead and abandoned. That's exactly what they earned themselves - after all they worked very hard for their Reputation and I sure won't challenge the fruits of their hard work.