[last modified on July 10, 2020 at 10:58 UTC]
Previously, the disabled button styling was inconsistent in the WordPress admin between the default and alternate color schemes. Styling was also different between primary and secondary buttons.
Prior to WordPress 5.5 beta 1 was decided to simplify all disabled button states to use the same design. There is no need for disabled buttons to convey primary and secondary visual semantics since the disabled