I just imported a new minimal theme that people might be interested in trying out.
This theme focuses on reducing clutter of the frontpage, it doesn’t change much (if anything?) about thread styling.
Go to profile (your avatar icon in the upper-right corner of the page)
-> Preferences (the icon)
-> Interface (bottom of menu on left side of page)
-> Click on Theme combo box
-> Pick either “Sam’s Simple Theme” or “Sam’s Simple Theme Dark”.
Post what you think about it here.
This is an example of what you can do with discourse theming, if you want to browse around in https://meta.discourse.org/c/plugin/theme and make suggestions about imports of new themes, I’d be happy to add some. If there are some simple tweaks I can generally handle that too (“Sam’s Simple Theme Dark” is a palette swap of the original “Sam’s Simple Theme” I whipped up in a few minutes).