I think it would be more flexible to instead of Geminispace and developing a browser without JS support to enforce “smolnet” would simply be to define a HTMLite standard with a subset where e.g. the entire script tag or img tag is not part of it. Then you have HTMLite verifiers (probably the simplest thing to verify!) to ensure a site is compliant and voila you need no Gemini protocol, only simple HTTP/1 and you can…
> The problem is that deciding upon a strictly limited subset of HTTP and HTML, slapping a label on it and calling it a day would do almost nothing to create a clearly demarcated space where people can go to consume only that kind of content in only that kind of way. It's impossible to know in advance whether what's on the other side of a https:// URL will be within the subset or outside it. It's very tedious to verify that a website claiming to use only the subset actually does, as many of the features we want to avoid are invisible (but not harmless!) to the user. It's difficult or even impossible to deactivate support for all the unwanted features in mainstream browsers, so if somebody breaks the rules you'll pay the consequences. Writing a dumbed down web browser which gracefully ignores all the unwanted features is much harder than writing a Gemini client from scratch. Even if you did it, you'd have a very difficult time discovering the minuscule fraction of websites it could render.
> Alternative, simple-by-design protocols like Gopher and Gemini create alternative, simple-by-design spaces with obvious boundaries and hard restrictions. You know for sure when you enter Geminispace, and you can know for sure and in advance when following a certain link will cause you leave it. While you're there, you know for sure and in advance that everybody else there is playing by the same rules. You can relax and get on with your browsing, and follow links to sites you've never heard of before, which just popped up yesterday, and be confident that they won't try to track you or serve you garbage because they can't. You can do all this with a client you wrote yourself, so you know you can trust it. It's a very different, much more liberating and much more empowering experience than trying to carve out a tiny, invisible sub-sub-sub-sub-space of the web.