I put together a plugin that auto registers ACF field groups as Gutenberg blocks. This allows new editor blocks to be inserted without extra boilerplate code in theme files. Simply activate the ‘Auto Block’ setting on a field group, configure the options and presto – the block will be available in the Gutenberg editor.
I also make heavy use of flexible layouts to create ‘page builders’ in templates, and included a new action that will convert existing layouts into stand-alone block-ready field groups. This has been very helpful in upgrading older projects.