while we're discussing it here...
I assume from my experience in DE, many camper friends in my list - who have little or no experience with SYS.txt, neither with graphic app. These people are happy and grateful when they get ready-made bitmap icons in multiple sizes with a KML - and then test which icon format they like.
If you are registered in a forum and know your way around, you can then access other settings and formats.
But I know more people who just "suck" but otherwise have no idea. *.svg is simply not appropriate.

* that's just my personal experience on it *