I support this feature request.
Most people who work with LaTeX or Markdown will use the inline equations and block equations for different purposes. And the convention mark for inline equation is ‘' in almost all case. For example, the Wikipedia also uses the '’ for the inline equation. So, every time we copy a sentence with many math symbols, it will be annoying that we need to add two extra ‘$’ to make it right. Many people have lots of existing notes with inline equations, and there are apps that convert images to source LaTeX code following this convention too. So, copying equations happen a lot.
Roam Research uses the ‘$$’ for inline equation might make it hard to write math equations since it conflicts with the convention. And supporting for block is also a nice feature since we normally use the entering style for block equation.
I think this feature should be token care of in early version since the transition may cause a mess.