I don't think that's what OP is saying. To me, it reads like, "I'd love to know what this is, but based on the linked document and others within near proximity - I can't" which means the link requires that OP has knowledge of the frontend build world - which I will tell you is niche and disparate or that there is a big unsaid problem in this space that is non-obvious to anyone outside of it.

Curiously, both are true. Give OP some slack.

If they don't have knowledge of the frontend build world, then maybe they'll have to do a bit more reading. Who should Vite's landing page target?

By knowledge, what I really mean is intimate knowledge. I'm not a frontend dev, but I do hack away on hobby projects which eventually caused me to make changes to the default tooling that the project starters pre-configure. Given that the landscape so heavily relies on preconfiguration and post-customization, who they're selling to are people who started with a template and know little about what webpack, vite, or next are doing.

And that's a pastime i welcome, as it saved me many clicks. And, it also confirms what i have been seeing across several websites of late: difficult to penetrate, even in areas i would consider myself well-versed in.

If the official homepage of something doesn't tell you what it is, where are you supposed to obtain that inforation?