Looking at the Haiku website files, it seems we are still using Bootstrap 3.3.7 - the latest version is Bootstrap 5.0.1!
I tried swapping out the Bootstrap 3 bootstrap.min.css file with a new Bootstrap 5 - surprisingly 80% of the site is good to go, but some bugs need to be fixed - for starters, the navbar defaults to mobile mode for some reason, and the “Activity” tabs have all lost their styling and shape. Additionally, the sidebar that appears on the left of news items and blogposts now shifts to the right.
Would someone be willing to help fix these issues once I push the changes to GitHub?