Geocities was right at the time, we have Wordpress (and yes MySpace and Tumblr and Google Sites and Apples site builder and Yahoo pages and Wix et cetera) and a million different blogging platforms now that fill most of what Geocities was (I had an account there).
For the rest of it there are better implementations of things like photo sharing (and now video sharing) or sharing guitar tabs or artwork or music or ...
>"It's worth it if it inspires even one kid to start building something." //
You can get a free domain name and run your own server with only a few clicks of the mouse now.
So, like I said, I don't get where "neocities" fits in to the web of today.