The customizable fit is all I was looking for. I bought the originals but gifted them to my parents, because my ear is messed up from years of high school wrestling without wearing headgear. I know I'm an edge case, but there have been plenty of other great earbuds (wireless and traditional) that use soft flexible tips over the past decade.
The default Apple headphones that come with the iPhones never fit in my ears properly, so I've assumed traditional Airpods don't either. They should make dummy versions of the new ones so they can be tried out.
Go in to the Apple Store after release, they usually have models available for trying them out. They keep em stashed away in the drawers of those big tables, and use alcohol wipes to clean them before you try em on. I didn't know this until I recently went in to look at the Powerbeats and one of the employees asked if I wanted to try them before buying. Good thing I did, they didn't fit my ear canal comfortably.
Even without wrestling injuries, my ears have never properly fit apple's in-ear headphones.
It's quite odd, for a company with so much ahead-of-the-competition accessibility work, that they've completely left out "people whose ear holes are slightly different" from what could be a profit center.
I bought a pair of apple airpods on launch, and after a week of them falling out every ten seconds, I returned them. They could have kept the money if there were different sizes, or some sort of non-hideous-third-party way to make them fit.
