- Dropped support for `.form-control-plaintext` inside `.input-group`s.
- Dropped `.input-group-append` and `.input-group-prepend`. You can now just add buttons and `.input-group-text` as direct children of the input groups.
- Form labels now require the `.form-label` class. Sass variables are now available to style form labels to your needs. [See #30476](https://github.com/twbs/bootstrap/pull/30476)
+- `.form-text` no longer sets `display`, but does set `color` and `font-size`. So instead of `<small class="form-text text-muted">` you should now use `<div class="form-text">`.
### Components