Idk if ur statement is a rebuttal to mine, but I'll just go with it anyways
I completely agree with u, just because someone share similar interests and personality traits, does not mean they should end up together. As I said, I have a liking towards opposite attraction romances, (not in this case) so I'm not saying that conan and ai should be in a relationship (I ship it, but i acknowledge rans existence as well, and I don't want Shinichi to lose interest towards her and just to go with Ai). I was simply stating a flaw from the previous persons content.
But i must say that conan and ais relationship may not be developing as two lovers, but as two good friends, they seem to trust one another more, and conan has recognised ai as his partner, so I wouldnt say their 'relationship' hasnt advanced or developed throughout the series.