I decided to try and make a layout with Gutenberg 7.3.
I've used Gutenberg for simple tasks on simple sites many times. I am an experienced WP user and developer. I have used other page layout tools like Elementor, Divi, Beaver, Visual composer, etc.

I aimed to recreate something I'd done in Elementor. Nothing too complex. A hero block with head and subhead text on one side, an image on the other. A background image for the row. A graphic overlay which partially occludes the bottom of the row contents.
Beneath that - a banner row, then finally a row divided in 3rds holding buttons. A very typical layout. Simple. Easy?

I'll spare you the play by play but within 5 minutes I was unable to move the rows due to selection issues, tools were contextually baffling due to lack of clarity about what was selected, handles being off the sides of the editor. The layout was really difficult to select parent and child elements (group, row, column, image) ...I never knew what was selected. It was always something I didn't expect (selected a child rather than the parent) The select tool never stayed active so invariably a wrong move was made, tool unselected itself, I have to undo, visit the menu try again. Over and over. Never getting what I wanted.

I tried switching to html mode to make sense of what I was editing and despite not altering anything Gutenberg told me the block was not valid , could not be rendered and I could convert it to html . No way back via undo.

I got to this same place 3 times after starting over fresh. A difficult to use frustrating experience.
I've been using WP for many many years, created themes and plugins. I know my way around.

Gutenberg has improved but
The Gutenberg team haven't solved the simple problems yet. The interface is horrible for selecting and moving nested elements. The navigator for elements is not at all robust. The Gutenberg inserter /object pane is tiny and the entire experience is incredibly frustrating if doing anything beyond "insert image".