Interesting example @sortega in that: Yes -unless you want to store images directly in your .html file (presuming the single-file model of wiki), which would quickly grow to unwieldy proportions thereby- the inclusion of images stored outside the .html file is not so easy.
OTOH: though it took a bit of time (and a healthy dose of community support to get it working) there is now a solution whereby you can simply drag&drop and image into a tiddler, whereupon it is automagically stored in the IPFS cloud at a canonical URL of your own creation! If there is any other freeware in the world that delivers such powerful functionality with such ease of use, i for one am unaware of it.
So it goes with a lot of things in TiddlyWikiWorld, it seems to me: tho a bit quirky and not perfectly natural on the face of it, many of those things that would take serious programming savvy to implement on any other platform are possible for non-devs to implement in TW, if you don’t mind either (a) doing a bit of digging to find the appropriate wikitext syntax, and/or (b) reaching out to the community, which is ever-so-ready & willing to help. Again, speaking more generally: nothing else like it out there, in my experience!
/walt