Bring it on.

I'm only worried about the abandonment of the customizer, widgets, and menus because those are integral to "universal" theme elements--even in our themes that are all block-based. Keeping our themes from the repo in compliance with all the theme review requirements for blocks, sample content, etc., is a lot of work--especially with markup changes that happen with each release to the block editor.

That said, the end-users are the ones who benefit most from the changes to how WordPress content is managed, and those are mostly my clients, who have been VERY happy with all the visual editing tools and templating abilities that come from the block editor. Seeing their eyes light up during training on the block editor and seeing them update their sites more often with more content that's better designed and more engaging is what I signed up for, and it's starting to really pay off for me, at least.

I'm definitely worried about the workload but excited about the possibility of winning over more potential theme users who currently rely on Elementor or other bloated tools.

🤘