>>137374107SoJ is retarded and insisted that they add all sorts of drama to the relationship or make it so that Sonic is so freedom obsessed he's literally incapable of slowing down for that sort of emoti I nal attachment - which eventually led to them making up shit like the nonsense in 06 with Elise, which was received about as well as you could expect, and when THAT didn't work, they tried to "fix" the relationship with Amy in Sonic X but only made shit infinitely worse since they shoved in literally all of the worst anime cliches of the 2000s into that show.
Honestly, you could genuinely argue that on some level, SoJ recognized that they'd done near-irreparsble damage to Sonic and Amy - which is likely why they were content to let SoA and the West work on repairing their relationship over the subsequent decades despite hating the shit out of them. Though given the Jap script for Frontiers apparently has them leaving Amy as batahit obsessed with vanity and beauty as ever, you could also say they didn't learn shit and just didn't want to keep eating L's back to back.