Not a bad reason, especially if you have saves on it. I'm sure there's a way to transfer them and make it work but I wouldn't be surprised if it wasn't perfectly straightforward so I can totally see not finding it worth the effort.
I never had a Game Boy, back in the day I was the kid tethered to the power cord with his Game Gear. I almost bought the adapter, but then I realized none of my games had saves so I had no reason to want to use the real carts.
