Not him, but I used TW extensively. The problem was the entire wiki is in one HTML file (which is impressive), but it did not scale with additional image tiddlers. At some point it would just not load. There is a separate NodeJS hosted version which I ran for a year, but it had memory issues. (Again, probably tied to the number of images). I totally get it's mainly for notes, but I'm lazy and sometimes I paste snippets from papers rather than rewrite them, so it balloons easily.

It's fantastic software, though!