Why is the NBA interior not as prevalent now as it was when there were four centers?

In the previous NBA, the interior was the absolute centerpiece of a team. That's because the league was previously dominated by positional play, but now it has favored the fast-paced outside. So in the league's excellent inside also began to become rare, the strongest active league inside all began to practice pulling space shooting ability. The NBA's interior linemen like O'Neal have been very rare

In the 1990s, the NBA interior linemen were very talented, and the league's style of play was completely different from the present, and there was a very famous saying in the NBA at that time, which was called, "Those who get the interior line get the world," and there was another saying, which was called, "The closer you get to the basket, the more you can get to the basket. There is also another saying, "the closer you are to the basket, the easier it is to score". These two phrases fully illustrate that, in the era of iron elbow flying, muscle collision, 210 or more big centers, is the protagonist of the NBA. Among them, the number of Patrick Ewing, David Robinson, O'Neal and Olajuwon these 4 people are the most prominent. At that time, the NBA referred to these four people as the "four centers". So, many years later, these 4 people have been successful retirement, their achievements in the NBA, dominance, influence, all aspects of the comprehensive consideration, who is first and who is after, how to rank it?

O'Neal's ability to overwhelm the other three at the top of the four centers is because O'Neal is indeed one of the most talented players in NBA history. The violent big man can not only hit the enemy with dunks that destroy the opponent's self-confidence under the basket, but also score with delicate techniques such as small hooks, small wipes, jumping hooks, and low back left and right hooks. O'Neal career 4 times won the championship, 3 times FMVP, 19 years playing for 6 teams, averaging 23.7 points 10.9 rebounds. His career a **** get 28,596 points, but this brother career free throws more than 5,300 free throws, if these free throws into 40%, then he can also take 30,000 points. In addition, O'Neal retired in the program also said suspected words against Olajuwon, O'Neal said, I certainly will not run training courses after retirement! The implication is that I am relying on talent and enlightenment to play, I have those skills, others can not learn!