That system is the Nostr client. Only one client has it, so far, but people will get used to leaving the [[wikilinks]] everywhere and the others will have to go along, eventually.

It's pretty cool, combined with semantic searches, as you nearly always get something relevant back, even if you type in something like [[white smoke]] or whatever.

And you can write a document, like a research paper, containing the link to [[SNPs]] or [[glaucoma]] and people clicking it will always get a result.