“Gutenberg 5.3 adds an experimental Legacy Widget Block that allows existing WordPress widgets to be added as Gutenberg blocks. It offers a dropdown of available widgets. After selecting one, the block populates that area with the widget’s settings” This is a little bit Brexit, isn’t it? If you don’t ‘do’ Gutenberg (Brexit) you can go on using the widgets and won’t need the ‘Legacy Widget Block’ (and stay happy in the EU/Classic Editor) … just a wee remoan 😀