Great review of all 3 tools. ACF for me clicked because of the credibility of ACF framework as a plugin. And also it's most intuitive among other tools. It is has huge UI controls already built to make the Block building much easier. It has a lifetime license which is a huge plus. I've already built a plugin on top of it acfblocks.com, which could be a great source of ACFBlocks examples for developers getting started with ACF.