I chose Jekyll because Github has it by default and is supported by almost every other SSG service/platform, such as Cloudflare Pages, Netlify, etc.
This lets me write locally on Obsidian without running Jekyll to preview my website. Jekyll is slow, as I have over 1,700+ articles (last time I checked, even after pruning). I can look at other options, but that is not my focus, and I honestly do not care. I push it to GitHub, and eventually, in the next couple of minutes, it gets updated.
Right now, I'm on a slow experiment to separate the content (markdown / plain text) from the styling entirely. So, I can play around with the design and themes but leave the content. Akin to how I can move on and walk away from Obsidian if needed - a tool on top of my content.
To me, I feel that VitePress is lot cleaner, leaner, and simpler than Docusaurus - https://vitepress.dev