Munir Kamal has written up a comparative examination of “HTML Bloat” in Gutenberg and Elementor. Munir created two versions of the same page layout in both Gutenberg and Elementor to compare the amount and quality of the code they each generate. Munir’s collection and presentation of the data from this experiment are well done. 👍
Of course, while the amount of markup and JavaScript (which affects page load, among other things) is an important factor it’s not the only factor in page bloat. I’ve seen some responses to Munir’s results from Elementor users, and to be fair, some of their arguments are valid. It’s also impressive how far Gutenberg has come in a relatively short time. 🏋️♀️