I'm kinda disappointed that there's only a single SSD option and no way to add another cheaper drive in it. That could've allowed someone to go with the lowest

I'm kinda disappointed that there's only a single SSD option and no way to add another cheaper drive in it. That could've allowed someone to go with the lowest internal SSD drive. I understand Apple wanted to make and keep this one small, but the ability to an internal hard drive could've helped a lot on the cost front and also helped on the speed front (compared to an external drive). In the past, I've replaced the DVD drive with another internal hard drive (though that was at a slightly lower speed).