This ship currently has over 12K tagged fics on Ao3, and for good reason. It also attracts tons of haters, mainly "my ship is more canon than yours" types who think that shipping should only be based on canon, vs "I like these two people and they would work well together".
No other popular ships for them touch me the same way and I think it's because they challenge each other's personalities. This isn't Golden Retriever x Angry Cat, or Brat x Brat Tamer; they're BOTH "too blunt jerks" (Suna and Motoya said this in the manga) who would probably have to learn how to compromise and mellow out for each other. It's not even like they're strangers; they were in youth camp (most likely as first years too), they played against each other, then MSBY, JNT and Team A. So they've played together longer than they've played with the other people they're commonly shipped with and know each other well. Their few canon interactions show a level of familiarity; they banter rather than fight. And I love that dynamic so much!