The goal is to have automatic links, as you can see in your message when you wrote âIUFâ or âInternational Unicycling Federationâ. Newcomers can wonder what these terms mean, so the terms directly link to the IUFâs official website.
But I also donât want to see a lot of messages cluttered by links, it would be ugly. 
To circumvent this, maybe we could restrict the links to acronyms. For example, âIUFâ would link to the website, but not International Unicycle Federation, because the terms are quite self-explanatory, sort to sayâŚ
The idea of having the acronymâs description when the mouse hovers the word (or on touch on touch screens) would be way more elegant in my opinion:
But hereâs the issue I mentioned. Such a component exists, but there is no official maintainer. I could in theory maintain it, but that would be some work.
Or maybe I can ask the Discourse development team to add this system to their current system of âwatched wordsâ (which is used, among other things to linkify words), but Iâm pretty sure it wouldnât be on their to-do list soon 
However, and on a less serious matter, an automatic link on UPD to turtleâs UPD video would be very funny, but the videoâs title should be âUnplanned Dismountâ or something like that so we actually know what the acronym means! 