Markdown inconsistencies and markdown flavour

I do love the simplicity of write.as and the markdown support. However, I find markdown support a little bit inconsistent and limited.

There are some inconsistencies in hos write.as interprets newlines in markdown, as can be seen in my markdown test post. Write.as treats both literal newlines and double spaces at end of line as newlines.

There are no support for description lists, nor footnotes. I have seen mentions of this on the forum that this belongs to extended markdown (comment on formats, discussion on footnoes, feature request for 1.0, request for markdown checkboxes), but there are different flavours of “extended markdown”, for example:

There are differences between them so when (if?) implementing “extended markdown” I guess a choice has to be made as to avoid a “Write.As Flavoured Markdown”.