It may have been said elsewhere (didn’t get a chance to read all of the comments), but the part I like least about the name TiddlyWiki is the Wiki part.
For many (and indeed in the definition of wiki), wikis are collaborative solutions. I find TiddlyWiki to be first and foremost a personal knowledge management platform (or digital garden, if you prefer that terminology), and many others have suggested the same. TiddlylWiki generally isn’t first designed for collaborative editing (yes, some plugins do allow that, but still…). TiddlyWiki is great to share one’s knowledge, but wikis are meant for collaborative editing…
Whenever I introduce TiddlyWiki to others, I am forced to add something along the lines of “it’s not really a wiki, in spite of its name”…
That said, I like tiddlers as a concept (nugget of knowledge), and don’t mind the Tiddly part of the name at all. Maybe we can simply drop the Wiki part of the name, nothing else changes?