Astro components vs MDX

[jylin]

Question: are there things you can do with astro components that you couldn't do with MDX? Is it worth considering deprecating the astro file format and just switching to MDX instead? There's far more support for MDX than Astro (for example, there's no IntelliJ support for *.astro files).

Also: is it possible to use MDX files for layouts? I think it currently doesn't support in MDX files.