It's today's NBA, position less basketball.
This theory the league has gone position-less ignores how players have become harder to define by 1 or 2 positions. The way successful teams play is roughly the same though. 1 offensive initiator who does the bulk of the ball handling while directing the teams offense. He's also the first of defense. Then 2-3 wings who can stretch the floor, attack the basket, and defend 3-4 opposing players at most times. Then 1-2 bigs that can finish inside at a high rate. They can rebound on both sides, creating more scoring opportunities, and defend the paint as a last line of defense. A strong big can get away with being the only big, like Embiid, or if they're paired with a large wing who can rebound then you can get away with 1, like AD next to LeBron in LA.
Positionless basketball is kind of a myth though. The league isn't positionless, the positions are no longer dictated by height like they were for decades because the level of athletes now is so much more than it ever was. You can be a 6'11" 270 lbs PG like Ben Simmons or a 6'5" PF/C like PJ Tucker. They aren't without position, they don't fit traditional labels.