Reasons

Reasons adds simple conditionals to field layouts – making it possible to hide or show fields on the fly, as content is being edited.

Craft 4.0 has been released, finally adding field layout conditionals to core! As such Reasons has become redundant, and will not be upgraded to support Craft 4 or later releases. Before upgrading your site to Craft 4, make sure to note any conditionals that you'll want to re-create using the core feature, before uninstalling Reasons.