You realize you did not pay for AiMesh tho, right? AiMesh is a totally new feature added afterward. It's a complex system, and will take time to stabilize. Asus are trying something that nobody has ever done here: implementing mesh networking on top of existing products that weren't originally designed for it.
Somewhat, but I bought a new RT-AC86u because of AiMesh. I'm sure others have too. So to say we didn't pay for it isn't 100% correct. I do agree with the stability comments though. I knew it was new and could have issues. I do expect it to function better soon though. I do know the product wasn't designed for it, but I doubt the general public knows that. Asus is marketing the feature pretty heavily. They don't have caveats about it maybe not working right.