It surprises me that there is no built in prefers-color-scheme (light/dark/native mode) support.
https://github.com/vinorodrigues/bootstrap-dark-5 is one of the main forks but it appears the developer is no longer working on it so the PR is closed.
I gotta say Bootstrap is still pretty great at offering relevant sets of tools for a lot of real basic stuff. I think that some stuff (probably the grid layout) is not as relevant as browsers have all gotten better CSS support. But it’s nice to be able to knock out clean HTML forms very quickly and have them look decent.
The default padding and everything set up for bootstrap is a work of art.