We don't hand-write more than Americans, yet we use cursive. And today's young adults still spent their entire childhood/teenage years hand-writing at school (and even though kids today have more computers in classrooms, they don't use a keyboard for everything, nor do I think they necessarily should).

So at least for that phase of life, writing quickly and efficiently is still a worthy goal. You can write however you want of course, but so many people choosing to let go of cursive tells me that it wasn't taught properly.

But yeah once you're out of the school system you might as well write everything in capital letters (that's definitely my go-to on paper forms to spare others the chicken scratches I use on personal notes).