I became aware of this while trying to understand #355

If I change the text font to "Comic Neue" (Only to get a distinctly different font)

Hello world, $"Hello world"$, $#text(font: "Comic Neue")[Hello world]$

will render as

This is not what I expect. In LaTeX, the input

Hello world, $\text{Hello world}$

will indeed render as

,

correctly using the text font when displaying text in math mode.

Why is this the correct behavior? Because it is common to write something like

And therefore, if $ f(a) > 0 quad "and" quad f'(a) > 0, $ we have

where the text is part of the, well, text. When this is typeset using the math font it looks very awkward.

Obviously this is an extreme example where the text and math fonts are wildly different, but it's still a problem.