Neocities is just a repeat of Geocities, and like everything else on the Web, it depend s on a third party to keep the service running, and whenever they lose interesting, all the content is lost. Even when somebody archives it, all the links are broken and the content becomes nearly impossible to find.

One of the big problems with the Web is that it's all ephemeral, it not a question of if it breaks, but when and how badly. A book doesn't disappear from your shelves just because the author lost interesting or the publisher goes out of business, but websites disappear from your bookmarks like that all the time. That's what needs fixing.

The other part is HTML itself. You shouldn't need to write raw HTML to write a website. That's the job of the browser. The very first browser that Tim Berners-Lee wrote supported editing, but that got completely lost over the years. A little bit still exist in the form of the 'contentEditable' attribute, but you can't author websites with that all by yourself, as there is no means of saving or publishing the results. No modern browser supports WebDAV either.