I am not saying he is perfect, but I am saying that he is not going to hit that wall. And i literally all the time try to have unbiased opinions, unless it's obvious irony or rarely trolling...
Thing about Luka is that he is an extremely hard working dude, that is 19 and actually has so much room to improve.... Besides that he has guts and is skilled... some might say a complete package.... so when defense go after him, i believe he will know no less than any other good player to adapt.... If anybody listened to any euro coach talking about him, would think the same... so one of the best ever coaches outside USA, Dusan Ivkovic, said that he never saw a player talented as luka... Another huge coach, Zeljko Obradovic, mentioned same thing and said that Luka understands that he has to work hard to achieve goals and that is very mature for his age... Blat said that in his opinion, knowing both leagues, Luka should be pick No1 without any doubt... And maybe most important thing is (and nobody is talking about this), Luka's father was a professional basketball player and was introducing basketball to his son since before his first birthday... That might not sound unfamiliar for a ballers family, but after recently I heard about that and seeing Luka's development, it came to my mind story about Polgar family. Who doesn't know it, I recommend checking it, very interesting... It's about father psychologist who was claiming that you can make any person a genius or something if you develop him/her correctly since birth. To prove it, he got married, got three daughters, and decied to teach them chess. They turned out to be 3 best female chess players ever... So if Luka's parents were doing something similar (and i can't see them doing it far from good by just observing Luka, and that's not just his play), I can see him reaching Lebron's level more than I can see him regressing... I guess time will tell