horizontal rule is barely there

[joyously]

The styles for <hr> make the element very short. When I look at the styles, it says
max-width: 2.25em
That's tiny and would be very unexpected for legacy content.

[kjellr]

The theme actually ships with three hr styles, all accessible via Gutenberg block variants:

For the purpose of preserving the expected visual appearance in legacy content, I'm fine with reverting to the middle version for hrs that don't have the wp-block-separator class.

[joyously]

That would be a good way to do it.

[mrwweb]

The default style is redundant with the line above the H2. Given that HR's and H2s are both used to denote major changes in content within a document, it makes sense for the theme to support them used in conjunction out of the box. I'd flip the 1st and 2nd styles.

[laurelfulford]

Closing this ticket, as it's been moved to Trac here: https://core.trac.wordpress.org/ticket/45912