It's also true in the context of (1), since the syntax specification specifically falls back to HTML for difficult things like tables.
This is made abundantly clear on the Syntax page[0]:
> Markdown’s syntax is intended for one purpose: to be used as a format for writing for the web.
> Markdown is not a replacement for HTML, or even close to it. Its syntax is very small, corresponding only to a very small subset of HTML tags. The idea is not to create a syntax that makes it easier to insert HTML tags. In my opinion, HTML tags are already easy to insert. The idea for Markdown is to make it easy to read, write, and edit prose. HTML is a publishing format; Markdown is a writing format. Thus, Markdown’s formatting syntax only addresses issues that can be conveyed in plain text.
> For any markup that is not covered by Markdown’s syntax, you simply use HTML itself. There’s no need to preface it or delimit it to indicate that you’re switching from Markdown to HTML; you just use the tags.
Markdown is very coupled to HTML, and is hobbled as a result compared to formats like Tiddlywiki and Org that not only have sophisticated syntax for all kinds of content like tables, but also directives to the parser itself to render particular blocks using an external tool. I wrote a bit about this in 2021 in response to query about why Org mode doesn't use Markdown[1].
This is made abundantly clear on the Syntax page[0]:
> Markdown’s syntax is intended for one purpose: to be used as a format for writing for the web.
> Markdown is not a replacement for HTML, or even close to it. Its syntax is very small, corresponding only to a very small subset of HTML tags. The idea is not to create a syntax that makes it easier to insert HTML tags. In my opinion, HTML tags are already easy to insert. The idea for Markdown is to make it easy to read, write, and edit prose. HTML is a publishing format; Markdown is a writing format. Thus, Markdown’s formatting syntax only addresses issues that can be conveyed in plain text.
> For any markup that is not covered by Markdown’s syntax, you simply use HTML itself. There’s no need to preface it or delimit it to indicate that you’re switching from Markdown to HTML; you just use the tags.
Markdown is very coupled to HTML, and is hobbled as a result compared to formats like Tiddlywiki and Org that not only have sophisticated syntax for all kinds of content like tables, but also directives to the parser itself to render particular blocks using an external tool. I wrote a bit about this in 2021 in response to query about why Org mode doesn't use Markdown[1].
[0]: https://daringfireball.net/projects/markdown/syntax
[1]: https://rpdillon.net/why-doesnt-emacs-org-mode-just-use-mark...