Ionescu will have many other double doubles in her career, but not as frequently as she did in college. Some WNBA teams actually play some defense, and will go the extra mile to put their best defensive "stopper" on her. Her style of play however IS conducive to attaining triple doubles, similar to the NBA's Russell Westbrook. A willing passer and rebounder, a triple double for him is nothing out of the ordinary for him.
Double doubles are and will continue to be a rare occurrence in the W. Most players go their entire professional career without having a single DD.
Like no-hitters in baseball, the possibility is always there, but there’s always that one ball that finds its way onto the outfield grass, or just out of reach of an infielder. Not to mention the fact that a pitcher has to have the stamina and control to go 9 innings. A perfect game is even more rare. No hits, no errors, no walks or pass balls and no hit batters. Note all of the Hall of Fame pitchers that had an "exemplary" career, but NEVER threw a no hitter.
I think she will get at least 2 more this season because of her skill set, and the minutes she spends on the floor. It will happen during the course (the natural ebb and flow) of a game, not because she’s trying to do it. The same way a player can score 35 points one night, making almost every shot from everywhere, to not scoring in double figures the next night. One game your rhythm is in sync and the basket looks the size of a “hoola-hoop”. The next game, it looks the size of a small trash can with a lid on it.