Empty ticket; everything is in subtasks & the work has been deployed.
Propose to close?

Backport complete

I don't think this is still an issue after having taking away dark & transparent modes.
Here's what this specific example now looks like in Dark Minerva

That text is at 50% opacity. We could increase that. -- pinging @JScherer-WMF for recommendation.

@lwatson do you have an example of where this is the case?

Confirmed on https://test.wikipedia.org/wiki/World

@JScherer-WMF Can you pitch in on whether we should allow the image to shrink slightly, or show less text?

@Etonkovidova yes, that's expected behavior.
Article share shows the full wiki wordmark logo ("Wikipedia", or in this case "W/beta") and no title.
Selection share shows the small wordmark ("W") and the article title.
The thinking is that the summary text for article share will likely already include the page's subkect (where it will be bolded), but it's likely to be missing in selections, and explicitly adding it there adds the missing context.

Rather than checking for specific devices, I reckon we might prefer to check for support of the feature(s): https://developer.mozilla.org/en-US/docs/Web/API/CSS/supports_static