The current core blocks seems ok for now. I have learned how to make blocks for my shortcodes, or lack of such, myself (plugin, child-theme/functions.php), thanks to @pento, so I’m very well prepared.
Blocks with server rendering is so much simpler than I anticipated. And shortcodes still work, just without visual WYSIWYG rendering in the editor.
A small step for me, a huge step for WordPress. continue;