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@Turtle91 you are missing the point.
Let's say you have an ePub that has lots of smallcaps such as a Discworld book featuring Death. Death speaks in smallcaps. In the eBook, you have the text as uppercase with spans to apply a smaller font size. Now if you are using a font that supports smallcaps and text-transform and you want to read with proper smallcaps, then why would you spend the time and effort to convert the text to lowercase when the text-transform will do it? All you have to do is add the text-transform and change the font size to a font-variant and you will have proper smallcaps. It's that easy.
So if I was going to read this eBook in KePub on my Libra 2, I would have smallcaps without needing to convert the uppercase to lowercase. And if I ever decided to read this eBook with a program that did not support smallcaps, I could take out the text-transform line and change the font-variant to font-size and I'm good to go.
That's why it's better to use uppercase for smallcaps then it is to use lowercase. You have options that way that work without the hassle of converting case.
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